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Essay / Research Paper Abstract
This 3-page paper discusses the phylogeny of the animal kingdom showing how major groups are related including a detailed representation of the deuterostomes (echinoderms, urochordates, cephalochordates, agnathans and gnathostomes). It also examines how early zoolologists classified the echinoderms and the enidarians together in one Phylum, the Radiata, because of their radial symmetry and explain why modern zoologists consider this classification erroneous. There are 3 sources cited.
Page Count:
4 pages (~225 words per page)
File: PG56_GPAanimalkingdom.rtf
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Unformatted sample text from the term paper:
listed below. Citation styles constantly change, and these examples may not contain the most recent updates. Animal Kingdom Research Compiled for The
Paper Store, Inc. by P. Giltman 5/2010 Please When classifying phyla, which remains an inexact science,
early zoologists basically grouped organisms based on general body planhttp://en.wikipedia.org/wiki/Phylum - cite_note-3#cite_note-3 as well as developmental or internal structures. Carolus Linnaeus developed a hierarchical classification scheme that continues to be
biologically useful to this day. This method compartmentalizes all of the organisms on the planet into categories based upon their characteristic features. So their form or morphology, internal organization or
anatomy, physiology or function, reproduction or sexual features and functions are used to group similar organisms into a few major groups called kingdoms. These major groups include one for plants
called Plantae and one for animals called Animalia. In biological classification, all organisms are classified in certain ranks called taxonomic ranks. There are seven main taxonomic ranks: kingdom, phylum or
division (botany), class, order, family, genus, and species. For example, a human would be in the Anamilia kingdom; the Chordata phylum; the Mammalia class; the Primates order; the Hominidae family;
the Homo genus; and the H.sapiens species. Often times, zoologists classify many different organisms into one phylum based on how they are related to each other. The phyla start to
break the animals, plants, fungi, etc into smaller and more recognizable groups. The best known phylum is Chordata, which contains all animals with backbones such as fish, birds, mammals, reptiles
and amphibians. There is also Arthropoda, which consist of insects, spiders, and crustaceans; Mollusca, which consist of snails, squid, and clams; and Echinodermata, which consist of starfish and sea urchins.
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