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Charles Darwin's theory of evolution
Essays on the origin of life
Essays on the origin of life
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Recommended: Charles Darwin's theory of evolution
What does it mean to be alive and what is the difference between the living and the dead? Ever wondered how the life originated on earth or our planet? It feels amazing when you knew that there is more galaxy around the world than salt in the sea and there is only one life on one planet earth. But how did it happen How did this miracle thing happened. It all happened around 1.3 billion years ago the first origin of life on earth. This is a slow process and it took thousands of years to complete. The evolutionist theory suggests that the life originated from simple atom like carbon, nitrogen. They react to under great pressure to form a single cell and evolve from there to become an organism.
According to the theory led by Charles Darwin in the evolution theory explains the origin of life to how to transformed to another being and changed. At first the life on earth was very hard to sustain. To evolve a life on anything there must be the perfect environment but the earth didn’t have any such environment. When the earth was first originated it was very hot poisonous due to the gas that were just made in the formation of the earth. Life couldn’t form on that situation. Slowly after thousands of years
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Living things like vertebrates and invertebrates were appeared on earth. The multi cellular organism start to evolve from that. The plants could only live in the sea at first but as the time passes they evolve and start to appear on the shore side of the sea and lakes. After that they start to appear on the land. Slowly the animals on sea were evolved like fish and other. All the animals first evolved on sea and then later on land. The evolution started in both land and water. Big sharks and fishes ruled the sea and the land was covered by vegetation. The tall trees and other fungi covered the land. Soon after that the animals on earth start to evolve too. animals and insects ruled the
The Precambrian Era is when the Earth formed. Earth was barley a spec of dust in outer space and as time went by it gathered ice, rock and more dust particles. It eventually formed into a big rock flying around in space. The Earth was extremely hot and so when it rained the rain would evaporate in mid air or immediately after it hit the ground. But even though it evaporated these great rains cooled the Earth eventually building up water in lower areas creating oceans. The Earths atmosphere was water vapor, carbon dioxide, nitrogen and gases. After awhile oxygen level grew in the atmosphere. The earliest life forms were single celled organisms that lived in the oceans. These organisms used light energy to produce food called photosynthesis. These were called Prokaryotes and Eukaryotes. The evolution of multi celled organisms were Dramatic in change.
"On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life," usually shortened to "the Origin of Species," is the full title of Charles Darwin's book, first published in 1859, in which Darwin formalized what we know today as the Theory of Evolution. Although Darwin is the most famous exponent of this theory, he was by no means the first person to suspect the workings of evolution. In fact, Charles owed a considerable debt to his grandfather Erasmus, a leading scientist and intellectual, who published a paper in 1794, calledZoonomia, or, The Laws of Organic Life. This set down many of the ideas that his grandson elaborated on 70 years later.
The Origin of Life has long been debated about. In result to that there are many hypotheses that each claim that’s how life started. Some of them claim life came from space, others from clay and even hydrothermal vents. However, they’re only theories which is why many experiments and research going into proving them. Many great minds such as Alexander Oparin, Gunter Wachtershauser, Robert Vrijenhoek and Louis Pasteur are the brains behind the hypotheses which is what makes them even more interesting to test out. The hypotheses that I researched were the Primordial Soup Hypothesis, the Iron-Sulfur World Hypothesis, the Deep Sea Vent Hypothesis, the RNA World Hypothesis, the Community Clay Hypothesis and the Panspermia Hypothesis.
The earth was more than six hundred million years old when the first signs of life started to show. The planet had cooled down from its molten state enough to support life. Scientists believe that the water was the reason that the earth formed its first life. The earliest living organisms were microscopic bacteria. There is fossil evidence of them from as early as 3.4 billion years ago. The first mulitcelled organisms have fossil evidence that dates back to about six hundred million years ago. The main forms of life consisted of sponges, cnidarians, and annelids.
...empt to impute the difficulty of imagining evolutionary pathways to the critic. The only difference is that Dawkins' version is more aggressively ad hominem. However, the fault does not lie in the critic but in the Continuum Argument. It is not the critic's job to imagine evolutionary pathways; it is the believer's job to demonstrate them without resorting to just-so stories. The philosopher David Hume once argued that we can imagine rabbits coming into existence out of nowhere, and he concluded from this that there is nothing contradictory in the notion that something can come from nothing. Now we certainly can form a mental image of rabbits coming from nowhere, as we can for the transformation of a lensless eye to a lensed eye or a steam engine to a warp engine, but we are not obliged to accept a necessary connection between our mental images and external reality.
In order for a species to survive, its population has to evolve. Evolution is the process of gradual change driven by natural selection to improve survival. Evolution is the explanation of how life got to its current state. Before the idea of evolution, the Bible gave the explanation of how things came to be, the Theory of Creation. Charles Darwin is credited for developing the theory of evolution.
The universe, and what it means to be alive is almost impossible to define; yet that does not stop humanity from trying. “Lonergan’s philosophy of the human person reveals that being human means having an unlimited number and variety of questions about life and the universe.” (Morgan, 1996). There is no limit on the number and variety of questions the human person will ask, "the most subversive people are those who ask questions” (Gaarder), as a result there are many varied and opinionated answers. This essay will explore three different theories on how one might find answers to life's ultimate questions. At one point or another, every human being has asked the question why: Why am I here? What is my purpose? What is the point? It is in our nature as human beings to reason, to think, to ask, it is what separates us from the rest of creation, and with this ability to reason, we are left with one question: Why? Throughout history many have tried to answer this question, some have come to the conclusion that meaning is found through God, and one’s faith. Others feel that life begins meaningless, and it is up to the individual to give life meaning; then there are those who believe that life has no meaning, and we are all essentially, just waiting to die, "The meaning of life is that it ends." (Kafka).
Evolution views life to be a process by which organisms diversified from earlier forms, whereas creation illustrates that life was created by a supernatural being. Creation and evolution both agree on the existence of microevolution and the resemblance of apes and humans but vary in terms of interpreting the origins of the life from a historical standpoint. A concept known as Faith Vs Fact comprehensively summarizes the tone of this debate, which leads to the question of how life began. While creation represents a religious understanding of life, evolution acknowledges a scientific interpretation of the origins of life. The theory is illustrated as the process by which organisms change species over time.
Understanding how life began is a crucial part of understanding and dissecting everyday questions. How could evolution explain the origin of life without creationism? Scientists and creationists need to start locating the similarities opposed to the differences.
The concept of behind evolution is that the universe tries to create more order, and things that are better suited for survival will survive and thrive. Variations of species that are more easily able to adapt are more likely to survive and reproduce thus increasing the population that has the adaptation. Eventually variations of species become species of their own and the cycle continues. Ronald L. Numbers points out that this change from lower order to higher order is also found in the Genesis creation story. First God created the heavens and the earth, then light and dark, then water and land, the sun and moon, vegetation, birds, fish, land animals, and finally humans. The chronological order of creation and the theory behind evolution is one and the same: take something that is not as sophisticated or highly developed, and enhance it to make it more advanced and suitable for survival than it was before.
The evolution theory, one of the most significant theories, laid groundwork for the study of modern biological science. This theory has lead scientists into unending debates due to lack of empirical supports. Until the mid-eighteenth century, when Charles Darwin came up with an explanation to evolution, scientists, then, began to endorse this hypothesis. In “Natural Selection,” Darwin explains the natural selection, a plausible mechanism that causes evolution, to gain approval of his cynical audience for his evolution theory. He supports his claim with numerous examples of animals and plants that have developed traits beneficial for survival. A century later, Stephen Jay Gould, influenced by Darwin’s work, supports the evolution theory with a different method. In “Evolution as Fact and Theory,” Gould, in contrast to Darwin, criticizes his detractors, the creationists who believe that every life form is the creation of a supernatural being, to reinforce the validity of the evolution theory. Gould undermines creationism by emphasizing its misused concepts of theory and popular philosophy, proving that it is not science. Besides denouncing creationism, Gould also provides theoretical examples as evidence to prove evolution is a theory. Despite their different approaches, both Darwin and Gould effectively prove the existence of evolution.
The world we live in today is full of an exceptional variety of animals. The time it took to conclude to the various sorts of species seen today has been throughout a period of millions of years. The vast majority of these animals are accredited to evolutionary advancements. When the environment changes, organisms have become accustomed to changing to fit their environment, to ensure their species does not die off. These physical changes have resulted in different phyla, ranging from basic structures, like sponges to advance systems, like that of an octopus.
How life originated on earth is a question that people have wondered for ages. One possibility that answer this brilliant question is the panspermia theory, which suggests that life on earth originated thanks to the contribution of cosmic beings that come from any point in the universe. This hypothesis does not speak of organisms ranging in meteorites moving through the universe to the Earth to conquer it, but it speaks of complex chemical substances which had been formed earlier from the origins of the universe, which reached the earth at any given time.
How life arose is a question that is fundamental to both philosophy and science. Responses to it enable one, in turn, to answer such questions as, “Who am I?”, “Why am I here?”, and “How do I make sense of this world?” This secondary set of questions can be answered in a myriad of ways for a variety of reasons, but the answer to the first question has only two responses. As Douglas Futuyuma says, “Creation and evolution, between them, exhaust the possible explanations for the origin of living things” (197). Either we are the product of the chemical and physical laws of nature operating over time, or we have been formed, at least in part, by some supernatural Force or Deity. The acceptance of one of these options as a foundation will determine how one will establish a belief system to determine his place in the world. This is a matter of crucial importance, yet in most biology classes offered at U.C. Davis, we learn that life came from nonlife by strictly natural (as opposed to supernatural) processes. The possibility that perhaps the origin of life cannot be explained by a natural mechanism is ignored, and this is disturbing. For if we limit what explanations we are willing to accept for the origin of life, we could be closing our eyes to reality.
Before any speculation toward the origin of biotic forms, what was present at the formation of the earth that could result in inorganic, then organic, and later biotic creatures? Early atmospheric conditions have been theorized to be present due to planetesimal collisions releasing gases present in the Earth, after the initial atmosphere of Hydrogen and Helium escaped Earth’s gravity assisted by heat energy. The earlier atmosphere is believed to have consisted mainly of carbon, hydrogen, nitrogen, and oxygen (bonded to other elements) in such forms as CO2/CO, N2, and H20. Stanley Miller, through experimentation, shows that given an energy source like heat or electric charge it is possible to form reactions that create complex molecules, and through subsequent experiments nucleic acids like adenine were even formed. This is the premise for the “hot” theories of the origin of life. Given there are many derivative possibilities like process evolution, chemoautotrophic, and photoautotrophic origins, the basis is that given an energy source (heat) basic elements can form and break bonds to become increasingly complex.