Search Results

Free Essays
Good Essays
Better Essays
Stronger Essays
Powerful Essays
Term Papers
Research Papers

Your search returned over 400 essays for "Biology"
<< Previous  1  2  3  4  5    Next >>

These results are sorted by most relevant first (ranked search). You may also sort these by color rating or essay length.

Title Length Color Rating  
Bioinformatics - Solving Biological Problems Using DNA and Amino Acid Sequences - Bioinformatics - Solving Biological Problems Using DNA and Amino Acid Sequences 1. Introduction In the wake of Genomic revolution, biology that used to be a lab-based science has transformed to embrace Information science. Human Genome Project is a 13-year project focusing on identifying approximately 30,000 genes in human DNA. The information found is stored in databases, analyzed and used for different purposes like simplifying diagnosis of disease, earlier detection of genetic predisposition to specific disease, custom drugs, gene therapy, gene replacement technologies [1]....   [tags: Science Biology Biological Papers]
:: 8 Works Cited
3063 words
(8.8 pages)
Powerful Essays [preview]
Biological Teleology in Contemporary Science - Biological Teleology in Contemporary Science Continuous controversies about how Aristotle's teleological biology relates to modern biological science address some widely debated questions in contemporary philosophy of science. Three main groups of objections made by contemporary science against Aristotle's biology can be identified: 1) Aristotle's biological teleology is too anthropomorphic; 2) the idea is tied too substance based; 3) Aristotle's final ends contradict the mechanistic spirit of modern science, which is looking for physical causes....   [tags: Philosophy Biology Papers]
:: 13 Works Cited
4132 words
(11.8 pages)
Powerful Essays [preview]
I Love You From the Bottom of My Brain: The Neurobiology Behind Love - I Love You From the Bottom of My Brain: The Neurobiology Behind Love You're at a typical weekend party. You spot someone across the room. They look over in your direction. "Wow, they're so beautiful," you think. You want desperately to go over and talk to them, but at the very thought of it, your heart starts racing and your palms begin to sweat. Looking over at them again, you see that amazingly enough they are coming over to you. Even before speaking to them, you feel like you have just fallen in love....   [tags: Biology Essays Research Papers]
:: 7 Works Cited
1246 words
(3.6 pages)
Strong Essays [preview]
Evolution: More Than One Level - Evolution: More Than One Level The evolution of art mimics biological evolution. For this reason art history and biology are comparable in many ways. Works of art are stories. Each work of art relates to and influences other stories, or pieces of art. Ernst Mayr uses the phrase "descent with variance" throughout his book to describe biological evolution. Art behaves similarly. In addition, like biological evolution there are serious ramifications for the production of art. Because it is possible to view art from an evolutionary perspective it is also possible to look at evolution from an artistic perspective....   [tags: Science Art Biology Essays]
:: 5 Works Cited
984 words
(2.8 pages)
Strong Essays [preview]
This Quicksilver Illness: Moods, Stigma, and Creativity - This Quicksilver Illness: Moods, Stigma, and Creativity A review of An Unquiet Mind by Kay Redfield Jamison Kay Jamison is one of the faces of manic depression (or in more sterile terms, bipolar disorder). She is currently the face of one of the renowned researchers of manic depression and topics relating to the disease, ranging from suicide to creativity. She is a tenured professor of Psychiatry at Johns Hopkins School of Medicine, author of a best-selling memoir and one of the standard medical texts on the subject....   [tags: Biology Essays Research Papers]
:: 4 Works Cited
1086 words
(3.1 pages)
Strong Essays [preview]
Cryobiology: Low Temperature Studies Of Biological Systems - Cryobiology: Low Temperature Studies Of Biological Systems Thesis: Low temperature biology, or cryobiology, has the possibility, and may very easily and very drastically affect everyones' lives in the future. Through rapidly approaching cryobiological medical procedures and techniques, the presence of intense ethical issues may play an important role in many everyday decisions that do not now exist. Introduction What is cryobiology. It is "the study of the effects of freezing and low temperatures on living organisms" (Read, 1999)....   [tags: Biology Biological Papers]
:: 13 Works Cited
4929 words
(14.1 pages)
Strong Essays [preview]
Do You Choose to be Homosexual? - Do You Choose to be Homosexual. Is it possible for one to choose his or her sexual orientation. Is one's sexual orientation something that can be changed, or is it a fixed attraction. These are a few questions, among many others that have been raised by researchers and religious organizations, as well as everyday people. Particularly, over the last decade there have been various debates over whether sexual orientation is based on genetic factors or whether it is a choice. Most researchers find that homosexuality, like many others psychological conditions, is due to a combination of social, biological, or psychological factors (1)....   [tags: Biology Essays Research Papers]
:: 4 Works Cited
845 words
(2.4 pages)
Better Essays [preview]
Metaphor, Sociobiology, and Nature vs. Nurture: The Biological Battle of the Century - Metaphor, Sociobiology, and Nature vs. Nurture: The Biological Battle of the Century Ladies and Gentlemen. I am proud to present one of the biggest and longest-running biological battles of the century. Tonight we recap the surprising nature vs. nurture fight. The following pages will explain the highlights, but if you want to learn about this war in its entirety, you’ll find the blow-by-blow account available to the public in Connie Barlow’s collection, From Gaia to Selfish Genes, in a chapter entitled "Nature, Nurture, and Sociobiology." What began this brawl of the biologists....   [tags: Biology Science Research Papers]
:: 1 Works Cited
2342 words
(6.7 pages)
Powerful Essays [preview]
The Human Perception of Pain in Conjunction with the Mind-Body Problem - The Human Perception of Pain in Conjunction with the Mind-Body Problem There is more research surfacing supporting the notion that people can control their pain. What is left under-examined is the notion of whether the pain is mediated by the brain, mind, or both. We all know that pain is an instinctive "sense" if you will, necessary to the survival of all living beings. Without pain, it would go unrecognized and exacerbate to the point of death. Pain is a protective mechanism essential to survival....   [tags: Biology Essays Research Papers]
:: 9 Works Cited
2044 words
(5.8 pages)
Powerful Essays [preview]
Attention Deficit Hyperactivity Disorder: Neurobiology of a Disorder or a Difference? - Attention Deficit Hyperactivity Disorder: Neurobiology of a Disorder or a Difference. Attention Deficit Hyperactivity Disorder (ADHD) is a phrase that has moved out of the realm of pure science or psychology and into common parlance. Like depression, the public has a general and vague sense of the "type" of person who may have ADHD, and has heard the name Ritalin, the main drug used in treatment, bandied about. As the name of the disorder implies, its symptoms present generally as "inattention and a combination of hyperactive and impulsive behaviors" (2)....   [tags: Biology Essays Research Papers]
:: 11 Works Cited
1837 words
(5.2 pages)
Powerful Essays [preview]
Considerations of Individuality in the Diagnosis and Treatment of Autism - Considerations of Individuality in the Diagnosis and Treatment of Autism There is no standard ‘type’ or ‘typical’ person with autism. Parents may hear more than one label applied to the same child: autistic-like, learning disabled with autistic tendencies, high functioning or low functioning autism. These labels don’t describe differences between children as much as they indicate differences between professionals’ training, vocabulary and exposure to autism (1) In my first web paper I considered Attention Deficit Hyperactivity Disorder, and questioned whether its’ symptoms and underlying neurobiology should be considered a disorder, or rather simply a difference among humans’ nervous syst...   [tags: Biology Essays Research Papers]
:: 10 Works Cited
2050 words
(5.9 pages)
Powerful Essays [preview]
The Australian Aboriginal People: Dating the Colonization of Australia - The Australian Aboriginal People: Dating the Colonization of Australia Abstract The colonization of each continent by modern human populations remains an important question in our history as a species. Studies of variations in mitochondrial genomes, Y-chromosomes, satellite DNA, and other genetic markers can be used to estimate the time of divergence of one population from another. Recent advancements in technology have advanced our capabilities in genetic analysis. In particular, PCR can be used to amplify, study, and sequence DNA from long-deceased specimens....   [tags: Biology Biological Colony Essays]
:: 14 Works Cited
3180 words
(9.1 pages)
Strong Essays [preview]
Large Amounts of Glutamine as the Cause of Disease - Neurodegenerative disorders such as Alzheimer's disease and Parkinson's disease are caused by the aggregation of abnormal proteins in neurons. An essential component of cellular function is the correct assimilation of proteins in the cell. Proteins fold into specific structures and then carry out cellular functions. However, when this folding process runs amuck, abnormal proteins are introduced into the cell. In neurodegenerative diseases, these protein aggregates are characterized by having genes which contain too many CAG trinucleotides repeats that encode for polyglutamine (polyQ)....   [tags: Biology Alzheimers Parkinsons] 2082 words
(5.9 pages)
Strong Essays [preview]
Malaria Parasite Plasmodium and the Epidemiology of the Disease - The Malaria Parasite Plasmodium and the Epidemiology of the Disease Abstract For ages malaria has affected mankind in almost all parts of the world. It has left a deep imprint on people who have been affected with the disease, and even today in countries where epidemics are common, malaria is a constant threat to people's daily lives. Malaria is caused by protozoan parasites of the genus Plasmodium (phylum Apicomplexa), and there are four species in the genus that cause the disease in humans. Their primary hosts and transmission vectors are female mosquitoes of the genus Anopheles; humans act as intermediate hosts....   [tags: Biology Medical Biomedical Disease]
:: 8 Works Cited
2087 words
(6 pages)
Term Papers [preview]
Are Our Morals Genetically Determined or Merely Assumed? - In a recent commentary for BBC News, Clark McCauley, Professor of Psychology at Bryn Mawr College, analyzed the issue of human evolution from a standpoint that drew on his knowledge of psychology: gradual and collective changes in human behavior. According to McCauley, as environments and situations changed, human behavior was forced to adapt accordingly. In his comments, McCauley cites the example of disgust; although it is now a common human reaction, McCauley claims it once did not exist. As humans became less capable of digesting raw meat, disgust became an important deterring force that, through the process of evolution, became a familiar and shared part of human existence....   [tags: Philosophy Biology Essays]
:: 3 Works Cited
929 words
(2.7 pages)
Strong Essays [preview]
The Complex Moral Issue of Stem Cell Research - The Complex Moral Issue of Stem Cell Research Works Cited Missing For Sale: One small miracle in a bassinet. Will cure AIDS, cancer, acne, possibly bad breath and athletes foot. Limited supply only, so call and reserve your miracle cure now, a.k.a. Human Fetus. Only a couple of years ago the ad above would have seemed like something from a science fiction novel. However, now the pages of that novel are coming to life. In 1998, James Thompson, a biology student from the University of Wisconsin, isolated the first embryonic stem cell....   [tags: Biology Biological Essays] 1159 words
(3.3 pages)
Better Essays [preview]
Evaluation of Sources Addressing Sleep and Performance - Evaluation of Sources Addressing Sleep and Performance Sleep loss and shifting sleep patterns are known to be widespread across college campuses throughout the United States and the world at large. Yet, while many studies exist relating sleep to performance, a much smaller amount of studies focus on the Through analysis of these sources as they would prove useful when researching and writing upon the idea of sleep and its correlation to academic performance it was found that a paper titled “Sleep-Wake Patterns and Academic Performance in University Students”, which was presented to the European Conference on Educational Research, is overall the most useful source represented to research t...   [tags: Research Education Essays Biology] 962 words
(2.7 pages)
Strong Essays [preview]
What is Addiction, and What Causes it? - What is Addiction, and What Causes it. When a mother brings her young son along with her to a methadone clinic for her daily dose, each nurse and staff members looks upon the little boy with worry. Is this child in risk of falling into the same patterns simply because his mother will find it difficult to teach him differently. Or, is he predisposed to drug dependence due to his own DNA. While drug dependency has not yet been reduced to a few "undesirable" genes in the human genome, most, if not all, scientists will agree that the risk of drug dependence is largely heritable....   [tags: Biology Essays Research Papers] 905 words
(2.6 pages)
Better Essays [preview]
Effects of Medicinal Versus Recreational Marijuana Use - Effects of Medicinal Versus Recreational Marijuana Use Is there a difference in the psychological/healing effects between the use of "recreational" marijuana and medicinal marijuana. Before researching this question, I could not understand what difference medicinal marijuana would have on cancer patients that was not already known through previous studies on the drug. I thought I fully understood marijuana's effects on the brain until the issues of medicinal marijuana arose. Prior to the research on the subject, I assumed that much of what is known now about the drug is due to the extensive research on its affects on Cancer and AIDS patients....   [tags: Biology Essays Research Papers]
:: 1 Works Cited
849 words
(2.4 pages)
Strong Essays [preview]
Artisitc License: Color Vision and Color Theory - Artisitc License: Color Vision and Color Theory Imagine yourself in an art museum. You wander slowly from cold room to cold room, analyzing colored canvases on stark white walls. When you reach a particular work, do you prefer to stand back and take everything in at once. Or do you move so close to the painting that the individual brushstrokes become apparent. Several different sensory processes occur in your brain during this trip to the art museum; the majority of them involve visual inputs....   [tags: Biology Essays Research Papers]
:: 6 Works Cited
1342 words
(3.8 pages)
Strong Essays [preview]
The Importance Of The Human Genome Project - The Importance Of The Human Genome Project This is the outstanding achievement not only of our lifetime, but of human history. I say this, because the Human Genome Project has the potential to impact the life of every person on this planet. It is a giant resource that will change mankind, much like the printing press did. The famous words of Dr. James Watson resonated as a victory bell, signaling the successful completion of what many deemed the boldest undertaking in the history of biology: The Human Genome Project (2003)....   [tags: Science Genetics Biology Papers]
:: 4 Works Cited
2751 words
(7.9 pages)
Powerful Essays [preview]
Memory, Learning and Our Virtual Brains - Clearly, education has an immediate and definite purpose in my own life. As a student, I have been exposed to events that have had a profound impact on the development of my interests, talents, values, or what some may call intelligence. My own approach to problem solving has inspired me to frame the question of the interplay of intelligence, human behavior, learning, and experience in the language of neuroscience. Neuroscience is appealing to me because it offers an explanation for the micro and macro-level processes that operate to create my complex and unique approach to problem solving and response to the world....   [tags: Biology Essays Research Papers]
:: 9 Works Cited
2659 words
(7.6 pages)
Strong Essays [preview]
How Flexible is the Brain's Circuitry? - How Flexible is the Brain's Circuitry. The brain is a complicated organ, containing an estimated 100 billion neurons and around 1,000 to 10,000 synapses for each of those neurons (1). This organ has the great responsibility of not only controlling and regulating the functions of the body but also sensing and perceiving the world around it. In humans, it is what we believe makes us the highly adaptive and intelligent organisms that we are, as well as give us our individuality. But with so many parts and connections to it, what happens when the brain's delicate circuitry is disrupted....   [tags: Biology Essays Research Papers]
:: 8 Works Cited
1696 words
(4.8 pages)
Strong Essays [preview]
The Nature and Function of Dreams - The Nature and Function of Dreams There is a state of consciousness in which one could be or experience anything imaginable. This state encompasses the ability to dream (1). The dream state is quite remarkable and incorporates infinite possibilities for the dreamer within each of us. Nietzsche (1844-1900), a German philosopher, points out that dreams were a puzzle since “the ages of rude beginning of culture” when “man believed that he was discovering a second real world in a dream... (2).” The question that human beings were wrestling with since then is: why do we have dreams and what, if anything, do they mean....   [tags: Biology Essays Research Papers]
:: 15 Works Cited
2687 words
(7.7 pages)
Powerful Essays [preview]
Yawning: It Isn't About Oxygen Anymore - Yawning: It Isn't About Oxygen Anymore Have you ever wondered why yawns are contagious; have you ever been in class and seen someone across the room yawn and found yourself following along. Have you ever been reading a book and, upon coming across a yawning character, been moved to stretch out your own face muscles. Most likely these things have happened to almost everyone more times than they can remember. I cannot tell you how many times I have yawned in the process of researching and writing this paper....   [tags: Biology Essays Research Papers]
:: 9 Works Cited
1673 words
(4.8 pages)
Powerful Essays [preview]
Xenotransplantation, Transgenics, and the Animal-human Boundary - Xenotransplantation, Transgenics, and the Animal-human Boundary The progression of modern science and technology has often challenged old, time-worn notions. Nowhere does this seem truer than in biology and medicine, as these fields have changed drastically in recent decades and also relate so closely to the actual substance of how people live. One such development is what is called xenotrans-plantation or the transplantation of organs or cells across species—particularly notable when from a non-human species into a human....   [tags: Biology Biological Essays]
:: 4 Works Cited
1855 words
(5.3 pages)
Powerful Essays [preview]
Xenotransplantation and Human Fetal Tissue Transplantation - Xenotransplantation and Human Fetal Tissue Transplantation ABSTRACT: The ecofeminist critique of dualism is applied to a consideration of two alternative paths that we might take in transplantation medicine: the utilization of organs and tissues taken from nonhuman animals, and/or further development of techniques for employing human organs and tissues, including human fetal tissue. It is concluded that from an evolutionary perspective, the assumption of a vast value disparity between human and nonhuman life is untenable, and from a moral point of view the establishment of yet another institution based on a dualistic opposition between human life, postulated to be of ultimate value, versus...   [tags: Biology Biological Science Essays]
:: 2 Works Cited
3511 words
(10 pages)
Strong Essays [preview]
There’s A Hair In My Dirt - Man Like Harriet in There’s A Hair In My Dirt, Larson depicts man in his egotistical essence as he struts through nature thinking he knows it all. When in actuality we have just begun. As a “higher” species, in the sense that we are capable able of verbal communication and intellectual thought, we dominate those species that cannot: the entire diverse world. Striving for this perfection, we have affected the environment and its organisms in many ways, whether beneficial or harmful. Considering ourselves as “higher” beings we tend to ignore the vastness of the world around us; We are blind to the biodiversity of all life and how very small and insignificant we truly are....   [tags: Biology Biodiversity Essays]
:: 7 Works Cited
1121 words
(3.2 pages)
Strong Essays [preview]
Biotechnology in the Rio Grande Valley - Biotechnology in the Rio Grande Valley When you get right down to it, the Rio Grande Valley is a lot like a cell. Everyone in the valley contributes to its existence, working day and night, keeping everything working. Our unique cultural blending serves as the DNA, and tacos seem to serve as our primary food source. Oh, and not to mention that the vast openness of the King Ranch serves as our cell membrane. The Valley, even though our quiet and simple life may not speak it, is well aware of the science taking place in the world around us, as well as in our own backyard....   [tags: Genetics Biology Essays Papers] 965 words
(2.8 pages)
Strong Essays [preview]
History And Procedures of Gene Therapy - The History And Procedures of Gene Therapy Abstract: Over the course of history there has been the idea of gene therapy has inspired many great scientists. The history of eugenics is important to the history of gene therapy because it is how gene therapy originated. Eugenics has driven many people to take extreme measures to try and make a “better human race”, this includes the Nazi party and the movement in the 1930’s inspired by Francis Galton. After that, research in eugenics continued and the human genome project sprung from the minds of scientists....   [tags: Biology Medical Biomedical Genetics]
:: 2 Works Cited
1810 words
(5.2 pages)
Term Papers [preview]
Phantom Limbs: A Neurobiological Explanation - Phantom Limbs: A Neurobiological Explanation Severely injuring a digit or limb can result in unrepentant damage and amputation. However, the painful sensations experienced in regard to that limb do not necessarily cease after amputation. The concept of feeling sensations in a limb that is no longer attached to the body is referred to as feeling a "phantom limb." This phenomenon is experienced by approximately 80%-100% of all patients who have lost a limb (1), and has therefore sparked wide interest in scientific community....   [tags: Biology Essays Research Papers]
:: 1 Works Cited
997 words
(2.8 pages)
Strong Essays [preview]
A Biological Look at Suicide - Efficiency Above All: A Biological Look at Suicide "And let me ask you this; the dead, where aren't they?" – Franz Wright, New Yorker Magazine, Oct. 6, 2003 "Dear Mom and Dad," the letter begins benignly, "Thank you for all of your commitment. But I am not a suitable daughter, and you will all be better off without me. Please realize I have done this for your own good." Nothing more. And beside it, Mr. and Mrs. A find their daughter, dead by her own hand. So begin the episodes of anguished soul-searching, of horrific "if-onlys" experienced by the family members of countless suicides....   [tags: Biology Essays Research Papers]
:: 12 Works Cited
2783 words
(8 pages)
Research Papers [preview]
Science Today and Human Cloning - Science Today and Human Cloning Nowadays, we are being constantly fed with the prophecy that molecular biology is the next revolutionary "wave" replacing information technology which has changed the way we live in the past 50 years. The past decade has seen scientists making significant breakthroughs in this field to start the current biotechnology hype. One defining achievement was the cloning of a sheep named Dolly by Dr. Ian Wilmut of Roslin Institute in 1996. This historic success debunked previous biology myth that adult cells have lost their totipotent abilities exhibited during early-stage embryonic stage....   [tags: Biology Research Essays]
:: 6 Works Cited
855 words
(2.4 pages)
Better Essays [preview]
The Causes of Psychogenic Dwarfism - I Won't Grow Up: The Causes of Psychogenic Dwarfism "All children, except one, grow up. They soon know that they will grow up, and the way Wendy knew was this. One day when she was two years old she was playing in a garden, and she plucked another flower and ran with it to her mother. I suppose she must have looked rather delightful, for Mrs. Darling put her hand to her heart and cried, "Oh, why can't you remain like this for ever!" This was all that passed between them on the subject, but henceforth Wendy knew that she must grow up....   [tags: Biology Essays Research Papers]
:: 1 Works Cited
2233 words
(6.4 pages)
Powerful Essays [preview]
Sexual Selection: Fact or Fiction - Sexual Selection: Fact or Fiction Darwin's theory of sexual selection is an intriguing one because it offers an explanation of human striving and cultural value systems. The theory is that humans who are more sexually desirable will have more offspring and thus their traits will be passed on to future generations to a greater extent than those of less sexually desirable humans. As opposed to Darwin's other theory, natural selection, those who are the best adapted to their environment will be more likely to pass on their genes, or, "survival of the fittest", you might call sexual selection "survival of the sexiest." The theory is intended to in part explain why, when humans diverged from ot...   [tags: Biology Essays Research Papers]
:: 4 Works Cited
1997 words
(5.7 pages)
Powerful Essays [preview]
Are Genetics Responsible for Allergies? - Are Genetics Responsible for Allergies. A Study In Identical Twins Everyone has either suffered from some kind of allergy, or knows somebody who has suffered from allergies. Allergies are the source of irritating symptoms, ranging from a painless skin rash to life-threatening breathing problems. For years, researchers have been trying to find out the source of these allergies. Some have suggested that environmental factors or early exposure to certain foods can cause allergies later in life, while others say that allergies are caused by genetics....   [tags: Biology Essays Research Papers]
:: 6 Works Cited
1644 words
(4.7 pages)
Strong Essays [preview]
The Issue of Non-Human Intelligence - The Question of Non-Human Intelligence Human beings have long assumed that they were at the pinnacle of the evolutionary pyramid thanks mainly to their more complex brain. They believe that this advanced brain makes them not just more intelligent but categorically different from all other organisms. Recent advances in the fields of neurobiology and anatomy have begun to chisel away at this most scared of human assumptions and demonstrate that human brains, and the intelligence associated with them, are not categorically different than other animals....   [tags: Biology Essays Research Papers]
:: 5 Works Cited
1892 words
(5.4 pages)
Strong Essays [preview]
Chemicals That Fix the Brain - Chemicals That Fix the Brain The discovery of how the brain heals itself began, as discoveries often do, with a question: Why do children who suffer brain damage often recover fully, while adults with the same kind of damage are permanently incapacitated. University of Wisconsin neurobiologist Ronald Kalil was among those who pursued the question (15). His studies in young cats showed that entire networks of brain cells could be routed around damaged areas. Young animals whose primary vision centers were destroyed could still learn to see normally, he found, because cells in another part of their brains took up the job of processing vision....   [tags: Biology Essays Research Papers]
:: 5 Works Cited
1624 words
(4.6 pages)
Strong Essays [preview]
The Hysteria Over Conversion Disorder - The Hysteria Over Conversion Disorder Scientists in fields connected to neurobiology and psychiatry remain mystified about the cause of Conversion Disorder. The disorder is characterized by physical symptoms of a neurological disorder, yet no direct problem can be found in the nervous system or other related systems of the body. This fact alone is not unusual; many diseases and symptoms have unknown origins. Conversion Disorder, however, seems to stem from "trivial" to traumatic psychological events and emotions rather than biological events....   [tags: Health Medicine Biology]
:: 3 Works Cited
1244 words
(3.6 pages)
Strong Essays [preview]
Interspecific Fungal Horizontal Gene Transfer - Abstract Abstract: Strong evidence was found that horizontal gene transfer occured between two fungal species. Genetic sequencing and compartive genomics, with specific attention to a loci containing the ToxA gene, showed that the two loci on Stagonospora nodorum and Pyrenophera tritici-repentis species are nearly identical and could not be derived from inheritance from a common ancestor. This gene transfer resulted in increased virulence of the P. tritici-repentis wheat pathogen sometime in the 1940's....   [tags: Biology Fungi Genetics Genomics] 3330 words
(9.5 pages)
Powerful Essays [preview]
Utilization of 14c Phenylalanine Derived from Arylphorin or Free Amino Acid in Manduca Sexta Pharate Adults - UTILIZATION OF {14C} PHENYLALANINE DERIVED FROM ARYLPHORIN OR FREE AMINO ACID IN MANDUCA SEXTA PHARATE ADULTS GENERAL INTRODUCTION TO THE PAPER How did someone figure out that carbon dioxide in the bloodstream is exchanged for oxygen in the lungs of mammals. And how do we know that hormones are produced by, for example, the pituitary gland and, moreover, that these hormones signal the body to grow. These and many other questions have been answered by means of the scientific method. Scientists form hypotheses, experiment, collect data, and draw conclusions from this data that is then applied to answering questions about that certain topic....   [tags: Biology] 2161 words
(6.2 pages)
Strong Essays [preview]
A Human Transporter Protein that Mediates the Final Excretion Step for Toxic Organic Cations - Introduction The kidney is an excretory organ that filters wastes from blood and excretes them as urine. Blood plasma filtration occurs at the glomerulus, which is a network of capillaries. Transporters are specialized proteins located in the membranes of the nephron. There are different concentrations of transporters located at various regions of the nephron. For instance, the proximal tubule retains most of the sodium transporters. Some transporters require adenosine triphosphate while others perform passive transport....   [tags: Biology] 1421 words
(4.1 pages)
Strong Essays [preview]
Atmospheric Oxygen, Giant Paleozoic Insects and the Evolution of Aerial Locomotor Performance - Animal gigantism was prevalent during the Carboniferous period of the Paleozoic era. Gigantism in flying insects occurred in abundance; however, arthropods, such as arthropleurids, also experienced gigantism. Arthropleurids existed during the Paleozoic era and were the largest land dwelling arthropods in the history of the Earth. 1m long millipedes are classified as arthropleurids. Amphibians such as the terrestrial labyrinthodont amphibians also became gigantic during the Carboniferous period. Large amphibians reached body lengths of up to 2m....   [tags: Biology] 2030 words
(5.8 pages)
Strong Essays [preview]
Analysis of the Enzyme Sucrase for Optimum Temperature, pH, and Concentration - Analysis of the Enzyme Sucrase for Optimum Temperature, pH, and Concentration ABSTRACT Enzymes react differently under different conditions and concentrations, being the most productive at the enzymes specific optimum condition and concentration. The enzyme sucrase, extracted from yeast, breaks down the complex sugar sucrose into the simple sugar glucose. Testing for sucrase’s optimum environment, multiple reactions were ran using varying amounts and concentrations of sucrose and sucrase at different pHs and temperatures....   [tags: Biology]
:: 4 Works Cited
2819 words
(8.1 pages)
Powerful Essays [preview]
Investigating the Effect ofTeeth Cleaning Agents on the Growth of Bacteria - Investigating the Effect of Different Teeth Cleaning Agents on the Growth of Bacteria On account of the price and variety of tooth cleaning agents available on the market, an investigation was conducted into the effect of different tooth cleaning agents containing different ingredients on the growth of teeth bacteria. The tooth cleaning agents tested were Colgate total antibacterial toothpaste with Triclosan (3 pence/ml), Boots non fluoride toothpaste (less than a penny/ml), Dental care baking soda toothpaste (2 pence/ml) and a twig from a natural toothbrush tree Salvadora persica commonly known as ‘Muswak’ (30 pence for two weeks supply, toothbrush not required as twig carries out the fun...   [tags: Biology] 1832 words
(5.2 pages)
Powerful Essays [preview]
Cloned stem cells may give you a new lease of life - Cloned stem cells may give you a new lease of life (A new lease of life means “an opportunity to improve someone’s future”) Summery Paragraph The name of my article is “Cloned stem cells may give a new lease of life” I found this article in the “New Scientist” magazine. It was published on November 8, 2002. The article is telling us about how to use therapeutic (treatment) cloning to take adult cells from a human body, create cloned embryos (animal or plant in the early period of its development before it is born or grown) and remove stem cells that can turn into a wide range of tissues (a bunch of cells forming an animal or plant....   [tags: Biology] 462 words
(1.3 pages)
Good Essays [preview]
Comparison of Science Based and Spiritual Based Reasons for Saving Environment - Although both authors fixate on the environment, Raven's focus is on society's aggregate affect on the terrestrial environment, whereas Kimball concentrates on the isolated individual and spirituality as well as the terrestrial environment. The parallels and contradictions between these two authors has changed my thinking through making it undeniable to me that I am a part of the intrinsic dilemma of furthering ecological sustainability, and helping all of God's children along the path. Kimball's focus is on the eternal perspective of things, and has somewhat of a higher understanding of what is eternally important than Raven does....   [tags: Biology] 449 words
(1.3 pages)
Strong Essays [preview]
The Effect of Temperature and Germination or Nongermination on Cellular Respiration - Cellular respiration is the oxygen-requiring reactions, occurring in the mitochondrion, that breaks down the end products of glycolysis into carbon dioxide (CO2) and water (H2O), while capturing large amounts of energy as adenosine triphosphate (ATP). Most cells can metabolize a variety of organic molecules to produce ATP. Virtually, all cells metabolize glucose for energy, at least part of the time. Secondly, glucose metabolism is less complex than the metabolism of most other organic molecules....   [tags: Biology] 937 words
(2.7 pages)
Better Essays [preview]
Relationship between brain Expansion and the Appearance of Tool-Making in Hominids - Introduction<P> Every organism on earth today, over millions of years has evolved from its predecessor. We humans, homo sapien sapiens, have also evolved from our predecessors, the Hominids. Experts like Archaeologists, Anthropologists and Palaeontologists are finding Hominid fossils every year and studying them to produce new or update theories on our past ancestors. If we go back in time up to 10 million years to when our ancestors were part of a large group of apes, they were similar in their physical appearance and even their intellect was similar....   [tags: Biology] 1517 words
(4.3 pages)
Better Essays [preview]
Investigating the Osmotic Values of Chinese Radish and Potato Cores - Investigating the Osmotic Values of Chinese Radish and Potato Cores Osmosis is the movement of water from an area of high water potential (Ψ) to an area of low water potential through a selectively permeable membrane. The diagrams above shows that only the water molecules can move quickly through the pores in the selectively permeable membrane. The sugar molecules (glucose arde too big to move through the gaps withease. Since there is a higher water potential on the left-hand side more water molecules will move from right to left, than from left to right....   [tags: Biology] 2914 words
(8.3 pages)
Strong Essays [preview]
Does raising the light intensity increase the rate of photosynthesis? - Does raising the light intensity increase the rate of photosynthesis. Aim: To see if raising the light intensity increases the rate of photosynthesis. Prediction:I predict that raising the light intensity will increase the rate of photosynthesis. I think this because light is the most important thing needed for photosynthesis. I then think that the rate of photosynthesis will stay the same when it reaches a certain point. I think this because the plant may use up all of the carbon dioxide (Sodium hydro carbonate) and the plant can have as much light as it needs but if it does not have any carbon dioxide it will not be able to photosynthesise....   [tags: Biology] 940 words
(2.7 pages)
Strong Essays [preview]
Public Policy Analysis: the Crime Rate Among Schizophrenic People - Schizophrenia is one of the most severe, chronic and disabling brain diseases. The most common assumption about this disease is that those who suffer from it have a "split personality." In the United States and other countries around the world, approximately 1 - 2% of the population has schizophrenia. This works out to about 2 million people diagnosed each year in America. Though it affects men and women at the same frequency, it appears in men usually in the late teens to early twenties and for women in the early twenties to early thirties....   [tags: Biology] 826 words
(2.4 pages)
Good Essays [preview]
Analysis of Load Carriage and Incline on Human Walking - Abstract: Past studies have showed mixed evidence regarding the effects of load carriage on stride length. Some studies have observed a decrease while others noticed no change in average stride length. Past studies have also been inconsistent with the usage of hip straps that are meant to transfer weight onto the larger muscles groups of the legs, which might lower metabolic cost. Our experiment considers both flat and inclined surfaces when determining whether backpack loads and the usage of hip and chest straps affect a walker's step length and post-exercise heartrate....   [tags: Biology] 2294 words
(6.6 pages)
Strong Essays [preview]
Possible Mechanisms for Trinucleotide Expansion in Fragile X Syndrome - Fragile X syndrome, a dominant X-linked disease, affects approximately 1 in 2,500 individuals and is a prevalent cause of inherited neurological disorders causing mental retardation (Kaufmann and Reiss 1999). A single mutated gene has been identified, FMR1, and defined as the cause of Fragile X. The Fragile X site is highly polymorphic in the chromosomes of Fragile X individuals and contains long CGG repeats. This CGG polymorphism has been identified as the cause of DNA instability (Kremer et al....   [tags: Biology] 2154 words
(6.2 pages)
Strong Essays [preview]
Review of Research Paper on RNA in Mammalian Cells - Review of Research Paper: Duplexes of 21-nucleotide RNAs mediate RNA interference in cultured mammalian cells Overview The significance of this experiment is that it shows how siRNA suppresses the expression of genes in different mammalian cells. It was known previous to the experiment that dsRNA can trigger apoptosis in cells- this is an automatic defense mechanism that mammalian cells use to protect against the dsRNA possessed by viruses. The dsRNA can cause RNA interference when it is taken into the cell by a transgene or a virus....   [tags: Biology] 1169 words
(3.3 pages)
Strong Essays [preview]
The Accuracy of the Animated Film "Ice Age" - A critique of "ICE AGE" In the 20th Century Fox production, ICE AGE, we are introduced to a variety of prehistoric animals trying to avoid the coming ice age by moving to warmer climates. This is a classic buddy story revolving around non-fiction animals of the ice age period. This rag tag group consists of a woolly mammoth, sabre tooth cat, a sloth and a sabre tooth squirrel. They join forces to reunite a human baby with his tribe. Of course, the sabre tooth squirrel isn't so much of the group as entertainment....   [tags: Biology] 526 words
(1.5 pages)
Good Essays [preview]
Survival of the Fittest: Defense Mechanisms in Nature - The intricacy and detail, the structure of every living thing is astounding. Each new personal discovery produces a broader appreciation and respect for nature, such as learning the number of species equipped with specialized defense mechanisms. This innate ability develops over time through adaptation. Adaptations are changes in an organism's physiological structure, function, or habits that allow it to survive in new surroundings. Animals utilize numerous weapons to escape harm. These include camouflage, trickery in the form of mimicry, chemical combat, and appearing injured or playing dead....   [tags: Biology] 588 words
(1.7 pages)
Better Essays [preview]
Study of Human Behavior and Sexually Transmitted Diseases - Everyone should be aware of the threat of sexually transmitted diseases (STD's). What everyone doesn't know is how common and dangerous these threats are. Currently, as many as twenty different types of STDs have been identified. Also, more than thirteen million men and women are affected by STDs each year (Men's Health, 2004). Each day this number grows. There is good news to consider about this topic. For one, even though many of these diseases don't have a cure, some of them do. Much more research is being conducted to produce even more cures and vaccines....   [tags: Biology] 490 words
(1.4 pages)
Strong Essays [preview]
Differing Rates of Evolutionary Change and Common Misconceptions - Evolutionary Time Scales EVOLUTIONARY time scales are difficult to comprehend from a human perspective; resultantly, anthropocentric conceptions of time have perverted evolutionary theory. Evolution is seen by laymen as a generational process - a process pondering the question: if the offspring of sexual organisms are always different from their parents, why does speciation only take place over many thousands of generations. Speciation - even adaptation for that matter - cannot be viewed in this microcosmic scope....   [tags: Biology] 2036 words
(5.8 pages)
Strong Essays [preview]
Interpretation on Scientific Article about Sense of Smell - Introduction The sense of smell is what informs an organism of the chemical composition of their surrounding environment. The sense of smell is called olfaction and in humans, it is less developed than in most other mammals. The olfactory system contains epithelial cells that are unique because they are capable of regeneration, unlike most other neurons. The receptors for both taste and smell are called chemoreceptors. They are termed chemoreceptors because they respond to chemicals that are in aqueous solution....   [tags: Biology] 2479 words
(7.1 pages)
Powerful Essays [preview]
Orangutans and the Meat for Sex Hypothesis - Abstract: The chosen study is a 1998-1999 survey of approximately 25 orangutans (Pongo pygmaeus) in the Meratus forest in Borneo. The Meratus forest has had no naturally occurring orangutan population since 1997, and it is a popular location to "reintroduce rehabilitant orangutans and translocate wild individuals (Grundmann, 300)." The initial goal of the project was to investigate newly reintroduced orangutans to determine what skills became underdeveloped due to the animals not needing to use them in captivity....   [tags: Biology] 1078 words
(3.1 pages)
Good Essays [preview]
Function and Structure of Hemoglobin and Myoglobin - Myoglobin consist of single polypeptide chain that made up of 153 amino acid and ahs a size of 18 kDa. Its three-dimensional structure was first determined by X-ray crystallography by John Kendrew in 1957. Myoglobin is a typical globular protein in that it is a highly folded compact structure with most of the hydrophobic amino acid residues buried in the interior and many of the polar residues on the surface. X-ray crystallography revealed that the single polypeptide chain of myoglobin consist of entirely of eight (labelled A-H) alpha-helical....   [tags: Biology] 829 words
(2.4 pages)
Better Essays [preview]
Survival of Warm-Blooded Aminals in Arctic Conditions - Aim: To find out how warm-blooded animals survive in the Arctic conditions. Background information: The Arctic conditions are extreme; they consist of sub-zero temperatures, heavy snow, strong winds and ice. To survive these conditions animals must keep a constant body temperature to maintain the optimum temperature for essential chemical reactions to take place. If a living cell cools to a temperature below 0°C then ice crystals can form which will puncture the cell membrane causing the cell to burst....   [tags: Biology] 1922 words
(5.5 pages)
Strong Essays [preview]
What Is the Role of a Macromolecule? - What is the role of Macromolecules. Macromolecules have a major role in everyday life, we might not notice this because we don't exactly know what we use them for and why they are so important to us, mainly because we can see them therefore we are not aware that they exist. The term macromolecules is sometimes used to refer to aggregates of two or more macromolecules held together by intermolecular forces rather then by chemical bonds. Another common macromolecule property that does not characterize smaller molecules is the need for assistance in dissolving into solution....   [tags: Biology] 1239 words
(3.5 pages)
Strong Essays [preview]
Male and Female Roles in Sexual Selection - Missing results graphs Why It Matters Sexual selection occurs across all species and is a key part of evolution. It allows animals to increase their fitness. Here are several interesting examples of cryptic female choice and male competition: 1) Males may perform courtship dances to show off their good genes. One species in which courtship dances can be observed are jumping spiders. Male spiders of this species wave their legs and arms to show females their abilities. Females choose a mate after seeing the dances....   [tags: Biology] 1105 words
(3.2 pages)
Strong Essays [preview]
Isolation of a Urea Degrading Bacteria - Isolation of a Urea Degrading Bacteria Introduction Urea was the first organic chemical to be synthetically produced1, previously it was thought that only living creatures could produce organic compounds Urea is naturally produced by the kidneys as waste from the degradation of amino acids. It is because of this that urea is commonly found in soils and is a useful nutrient source for bacteria that are able to utilise it, such as, Helicobacter pylori, Klebsiella pneumonia, all species of Proteus and Micrococcus luteus....   [tags: Biology]
:: 5 Works Cited
795 words
(2.3 pages)
Strong Essays [preview]
Compare and Contrast Mitosis and Meiosis - Compare and Contrast Mitosis and Meiosis Meiosis and mitosis describes the process by which cells divide, either by asexual or sexual reproduction to produce a new organism. Meiosis is a form of cell division that produces gametes in humans these are egg cells and sperms, each with reduced or halved number of chromosomes. The number of chromosomes is restored when two gametes fuse together to form a zygote. A cell with two copies of each chromosome is called diploid cell and a cell with one copy of each chromosome is called a haploid cell....   [tags: Biology] 493 words
(1.4 pages)
Good Essays [preview]
The Genetic Code and Protein Synthesis - The Genetic Code and Protein Synthesis Genetic code is the sequence of organic bases on the double strands of DNA. These bases line up in a particular order to code for things like eye colour, hair colour and height. Every person has an individual genetic code and no two persons are exactly the same. DNA replicates in a semi-conservative manner. The two strands are separated by an enzyme called Helicase and both become templates for new DNA. Each strand then attracts new organic bases to the ones already present e.g....   [tags: Biology] 287 words
(0.8 pages)
Strong Essays [preview]
Response to Article about Cystic Fibrosis - Cystic Fibrosis - Summary of Article It has been known for quite some time that CFTR is a cAMP regulated chloride ion channel whose mutation is intimately linked to cystic fibrosis (CF). However, the abnormality in the chloride ion channels is not the only biochemical peculiarity associated with the disease. Of particular interest to researchers is the finding that sodium ion (Na+) absorption in the cells of CF patients is both elevated and positively related to the cAMP concentration, whereas, in normal cells, cAMP concentration is inversely related to the rate of Na+ absorption....   [tags: Biology]
:: 1 Works Cited
3115 words
(8.9 pages)
Better Essays [preview]
Benefits of Cholesterol to Brain Development - What do you think of when you hear the word cholesterol. It's pretty common to think that it makes you gain weight, it is bad in large quantities, and it is generally unhealthy. But a recent experiment has shown that although it can be bad in some ways, it is good for you in other ways. One of the most important parts of your body is your central nervous system (CNS). It includes your spinal cord and your brain, and it is run by cells called neurons. These neurons, with the help of synapses, send electrical signals throughout the body....   [tags: Biology] 2224 words
(6.4 pages)
Strong Essays [preview]
Perceptions of Mental Illness - Perceptions of Mental Illness Throughout this course, much of what we have discussed has depended strongly on an interpretation of scientific information. We have questioned, criticized, accepted, rejected, and formed our own ideas about topics in neural and behavioral science. A book which I have read recently seems to fit in with this type of discussion. Blaming the Brain, by Eliot Valenstein, describes the major biological theories of mental illness and the lack of evidence we have to fully support them....   [tags: Biology Essays Research Papers]
:: 6 Works Cited
1556 words
(4.4 pages)
Strong Essays [preview]
Synthetic Model of Bioethical Inquiry - Bioethics and the Synthetic Model of Bioethical Inquiry ABSTRACT: Bioethics, viewed as both a form of reflective practice and a developing discipline, is concerned with the moral aspects of health care practice and research. With its steady maturation in the domain of moral discourse, bioethics has presided over a number of questions about the nature of human illness and how problems imposed by illness can be understood in an age marked not only by progress, but also by the concomitant fear that such progress will outstrip our humanity and our dignity as persons....   [tags: Biology]
:: 10 Works Cited
4909 words
(14 pages)
Strong Essays [preview]
White Rat Dissection Lab Report - White Rat Dissection Lab Report GOALS: Learn about the anatomy of the White Rat. Gain dexterity with instruments used in the dissection procedure. Compare and /or contrast the anatomy of the White Rat with that one of the Human body. MATERIALS AND INSTRUMENTS: Cadaver of a White rat, preserved in chloroform. A dissection pan, Butcher’s twine, Bounty paper towels, latex gloves. 3. Instruments used in the dissection kit: Scissors; Forceps; Scalpel; and the Probe PROCEDURE: The first step was to obtain the White Rat and to tie it in the supine position, anterior surface facing up in side the dissection pan....   [tags: Biology] 988 words
(2.8 pages)
Strong Essays [preview]
Exchange and Transport in Protozoa - Exchange and Transport in Protozoa The exchange of gases between the environment and cells occurs via the process of diffusion. Diffusion depends on: · The amount of surface area available for diffusion. The larger the surface area the greater the rate of diffusion. · The concentration gradient. An organism which respires very quickly will have a much lower concentration of oxygen in the cells and a higher than normal concentration of Carbon Dioxide. So the greater the concentration gradient across the respiratory surface the quicker the rate of diffusion....   [tags: Biology] 429 words
(1.2 pages)
Strong Essays [preview]
Coming of Age in Mississippi - During Essie Mae's childhood, many conditions made her young life very difficult. Even though she was a little girl, she had experienced how hard life was for most African American people during those years of segregation. I believe that Essie Mae did not have a positive childhood because she did not have people who influenced her life in a good and positive way. First, the fact that her father left the house, I think, can be one of the hardest experiences in her childhood. In some cases for a child that can turn into a trauma which can affect his or her future life in a negative way....   [tags: Biology] 350 words
(1 pages)
Strong Essays [preview]
The Importance of Geographic Isolation - Although Darwin and Mayr both contributed enormously to the topic of speciation, they had two totally different views on the main mechanism driving it. Darwin noticed geographic isolation but discounted any importance in it believing natural selection to be the driving force, while Mayr believed that geographic isolation was the driving force of speciation and founded the theory of allopatric speciation. For decades Mayr's idea has been the traditional method thought to result in the highest amount of speciation, but recent support has shifted from allopatry and Darwins gradualism to rapid and sporadic periods of speciation with periods of relative equilibrium regardless of geographic barri...   [tags: Biology] 1135 words
(3.2 pages)
Good Essays [preview]
On the Brink of Extinction - Introduction Biodiversity is the grand diversity of all life on Earth and the interconnections that support these forms of life. This astonishing diversity supports the human existence by providing numerous priceless resources such as food, fuel, and medicine. Many of these resources can not be duplicated by the human race. For these reasons it is obvious that the environment and the biodiversity that it supports are detrimental to human survival. There is one major problem that is growing each day, and that is the amount of biodiversity, along with the services and benefits that is provides is diminishing....   [tags: Biology] 891 words
(2.5 pages)
Better Essays [preview]
Tissue in the Human Body - Connective Tissue Connective tissues are found all over our bodies. Generally, they are located in blood, fat, and between muscles and bones. The matrix is the substance that surrounds the cell. Matrices can be fluid or solid, depending on where they are found. They also are found to have varying degrees of vascularity. For example, a bone would be very vascular while cartilage is avascular. Two good property the cells of connective tissue have is that they can divide and repair themselves. The functions of these tissues are: to bind structures, support, protect, serve as framework, store fat, produce blood cells and repair damage....   [tags: Biology] 1104 words
(3.2 pages)
Strong Essays [preview]
GLUT 4 in Muscle Cells - Hypothesis During muscle contractions cytosolic calcium and adenosine monophosphate activated protein kinase (AMPK) levels increase. Exercise also increases GLUT 4 production, which allows more glucose to be metabolized in the muscle cell. The purpose of this study was to determine whether calcium and AMPK cause the increases in GLUT 4 production in the cell. The hypothesis regarding GLUT 4 being tested in this research article stems from related research, which showed that GLUT 4 and mitochondria increase due to repeated bouts of muscle contraction....   [tags: Biology] 1086 words
(3.1 pages)
Strong Essays [preview]
Cell Matrix Adhesions and Fibroblast - Missing results figures How are cell matrix contacts regulated. The two papers explained in this website: "Regulation of protrusive and contractile cell-matrix contacts" and "Dynamics and segregation of cell-matrix in cultured fibroblasts" explore both the types of cell matrix contacts and the interactions between these contacts in many different bodily cells. Cell matrix contacts are parts of the cell surface where specialized adhesion receptors in the membrane attach to the extracellular matrix (ECM), the matrix outside the cells....   [tags: Biology] 2034 words
(5.8 pages)
Powerful Essays [preview]


Your search returned over 400 essays for "Biology"
<< Previous  1  2  3  4  5    Next >>