Unit 5 IP part 2 - fish from the most primitive to more...

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1. Which phyla lack organs? What type of symmetry do they have? Porifera and cnidaria. Porifera do not have any symmetry in their form, cnidaria have a radial symmetry 2. List all of the phyla that show cephalization. platyhelminthes, nematoda, annelida, mollusca, arthropoda and chordata 3. Do all organisms on the table have 3 germ layers (endoderm, ectoderm, and mesoderm)? If not, which phyla have fewer than three germ layers? Porifera and cnidaria 4. One phylum on the table has more species than all the others. State the name of this phylum, and provide several different examples of species found in this phylum. Athropoda has the most species. Some examples of athropoda are ants, beetles, crabs, and spiders. 5. Fish do not all have the same skeletal structure. Describe the differences among
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Unformatted text preview: fish from the most primitive to more advanced types of fish. Primitive fish do not have jaws or pectoral fins, more advanced fish such as sharks have cartilage skeletons. 6. Describe the three types of mammals based on how their young develop. The three types of mammals are; marsupials, which have their young develop in a pouch, monotremes which lay eggs and the young develop in the egg, and placentals which have their young develop in a womb. References AIU Online. (2011). SCIE206-1055B-11: Biology: Unit 5 Multimedia Course Material. Audesirk, G., Audesirk, T., & Byers, B. (2005). Biology: Life on earth with Physiology 9th Ed. San Francisco, CA: Pearson Education....
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Unit 5 IP part 2 - fish from the most primitive to more...

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