Phylum chordates are a taxonomic rank below kingdom that includes organisms such as mammals, fish, birds, reptiles, amphibians, all vertebrates, tunicates, and cephalochordates. To be in the phylum of chordates you must at some point in your development of life have a dorsal nerve, or hollow nerve cord which is in the central nervous system that acts as a support to the locomotion system. I will discuss the different kind of organisms along with some characteristics of the organisms found in the
organisms. Also, research involving the model organisms has allowed scientists to gain a better understanding of developmental processes and functions (Anderson and Ingham 1003). Since 1871, ascidians, or sea squirts, which are simple invertebrate chordates, have been used as model organisms to study embryonic development. The ascidia embryo represents an ideal model for vertebrate development because it has the same basic developmental and morphologic features of vertebrates. Furthermore, as a less
Exam 2 Colette Cabaniss Student K00479544 (colettecabaniss@yahoo.com) login:fireant Question 1 Echinoderms are captivating organisms. They have a number of specialized structures and functions. They have unique water vascular systems, aboral surfaces, and feeding structures. This sets them apart from other animals because of their distinct characteristics. The water vascular system of echinoderms is a hydraulic system that they use for respiration, getting rid of waste, and a way of movement
Anatomy A way to identify a fish is by their body structure, they have fins and a backbone. The anatomical adaptation of fins helps them survive and makes them and marine animal unique in that they use them to maintain their position, move, steer, and stop. Most fish have scales and breathe though gills. Most fish also have a mucus layer that helps them prevent infections. With in what we consider “fish,” there are many that don’t very much look like they are earth creatures. The strangest fish
Echinoderms (scientific name Echinodermata) are a major group of only marine animals. The name comes from the Greek word for "spiny skin". There are about 7,000 species found usually on the sea floor in every marine habitat from the intertidal zone to the ocean depths (Marine Education Society of Australasia 1999-2015). They occur in various habitats from the intertidal zone down to the bottom of the deep sea trenches and from sand to rubble to coral reefs and in cold and tropical seas. Some echinoderms
The Giant Oarfish Cool Facts: The giant oarfish has a number of characteristics which makes it unusual. One fact is that it is the longest bony fish alive today- up to 36 feet long (11 meters). A second fact is that, since it sometimes floats on the surface of the ocean when it is sick or dying, it may be the source of the idea of sea monsters. A third fact is the entire taxonomic family to which the oarfish belongs consists of only four living species. Taxonomic Information: The scientific
Dichotomous Key Prior to evolutionary theory, scientists relied on similarity of physical characteristics to classify organisms. An 18th century naturalist, Carolus Linneas, developed a taxonomic classification system. This hierarchical system divides organisms into 5 kingdoms. Organisms visible to the unaided human eye fall into the plant, animal, or fungi kingdom. Kingdoms are then divided into phylum. This division is based body type and skeletal organization. Phylum are then divided
Oral Presentation #1: The first presentation that I attended during the STARS Symposium was about Environmental Science and Ecology. The presenter was Jamie Lane, and she was a Environmental Science graduate student at UIS. Her presentation was called “Spatial Association Between Bison and Brown-Headed Cowbirds” and it focused on a species, the brown-headed cowbird, that had not been studied much previously. The purpose of this study was to reveal the relationship between bison and the brown-headed
Evolution can be defined as a developing process, where an animal or plant gradually becomes a more advance and multifaceted form. Examples of evolution include natural selection and mutations. Throughout history our planet and the species found on it were required to evolve to survive. Thus, leaving the best possible forms to survive and thrive throughout history. This process took time and has produced many variations, but the common result is species that became enhanced. There are many different
The unicorn is most often compared to the rhinoceros. In fact, according to Costello, many people speculate that the “unicorn” Ctesias witnessed was actually the Asian rhinoceros (Costello 1979:96). According to Robin, many people seem to have made the same mistake throughout history, however, there have been sources who have been able to differentiate between the two animals. During his travels, Marco Polo carefully distinguished the Asian rhinoceros from the unicorn by saying that the rhinoceros
led to bigger animals such as elephants. The largest member of the chordate phylum that ever walked on Earth was dinosaurs. The closest animal relative to humans is great apes. Great apes can think, feel, nurture own kind, pass on social skills, mimic, and remember just like humans do. Human intelligence is greater than anything on Earth! This video enhanced my understanding on Chordates because it explains how some chordates are or are not vertebras and it showed how land animals evolved from
that developed into the vertebrates and human life as we know today. The Cambrian Explosion took place in the Paleozoic era where a diversity of life emerged, leading to the lineages of almost all animals living today. Included in this group are chordates, a group of vertebrates, which humans are a part of. Ever since this phenomenon, numerous species have evolved with great changes including Homo sapiens. What happened during the Cambrian Explosion and how did it impact human evolution? Common Theories
homologous features. Homologous is being in similar structures, and having similar genes indicate species are from a common ancestor, but does not have indicated that these features will work exactly the same. Humans and fish are related in the lineage of chordate because human shared homologous features to fish. Homologous features shared by human and fish enlighten the evolutionary pathway from the earliest vertebrate by sharing similar structures of the hands and fins, the development of teeth that diversified
extinct. Because of early organisms' ability to adapt, many of the animals alive 543 million years ago, in the Cambrian Age, are alive today. Animals like Echinoderms, now the modern starfish and sea cucumber; annelids and priapulidas, now worms; chordates, mammals and anything with a backbone; arthropods, including insects and spiders, crustaceans and scorpions are such animals that have been evolved from early animals alive more than 500 million years ago. The Cambrian Age was the period where
characteristics of a Chordate are a notochord, pharyngeal slits, a dorsal hollow nerve cord, and a post-anal tail (Boundless.com). Boundless.com says a notochord is,” a flexible rod-like structure that forms the main support of the body in the lowest chordates; a primitive spine. The pharyngeal slits are openings in the pharynx (Boundless.com). The dorsal hollow nerve cord is, according to Boundless.com, “a dorsal tubular cord of nervous tissue above the notochord of a chordate”(Boundless.com). Boundless
free will through their movements. Humans are in the Phylum of Chordata because all of the Chordates have elongated symmetrical bodies and all begin life with gills to breathe in a liquid environment. Vertebrata is the subphylum where humans are put because they develop a spinal chord that stretches from the head to a paired of sense organs. Vertebrata is the most advanced and numerous subphylum of the chordates. The Class of Humans is Mammalia because they all conceive there young in the reproductive
Evolution has become a controversial topic over the years and with dominant evidence, we know that it takes place even today. Evolution is a slow and time consuming process which is why we do not observe it instantaneously. To observe evolutionary patterns, you must take it in large amounts of time. Charles Darwin is known as the “Father of Evolution” and discovered much of the evolutionary concepts that we have an understanding. Evolution has branches that include change with humans, animals, sex
B.ED. SCIENCE WITH SPECIALISATION IN BIOLOGY Table of Contents The Burgess Shale Fauna 3 Introduction 3 History of Discovery 3 Preservation Bias 4 Major Fossils 4 Concluding remarks: 7 References: 8 The Burgess Shale Fauna Introduction The Burgess Shale Fauna is a fauna that was constructed based on a group of fossils that were initially found, in the Burgess Shale area in the Canadian Rockies (Gould, 1989). They are a very important group of fossils as “modern multicellular
Walcott and Raymond quarries (Hagadorn, 2002). Though he was originally in search of trilobites in the Burgess Shale Formation, paleontologist Charles Walcott also discovered a diverse group of soft- and hard-bodied fossils, from algae and sponges to chordates and cirripeds (Hagadorn, 2002). Soft-bodied fossils are incredibly rare due to their delicate structure and susceptibility to decay, so it is hard-bodied fossils that more regularly occur in fossil findings. However over 75,000 soft-bodied specimens
What are the sources of evidence on the relation between brain and behavior? The evolution of brain and behavior in various animal species , how the brain impacts behavior in people with normal functioning, and how the brain changes in people who suffer brain damage or dysfunction. Distinguish between the central and peripheral nervous system. The central nervous system consists of the the brain and spinal cord while the peripheral nervous system consists of all the neurons in the body outside