BS 110 Notes 11-3-2010

BS 110 Notes 11-3-2010 - BS 110 Notes 11-3-2010 Exam 3:...

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BS 110 Notes 11-3-2010 Exam 3: Genetic Drift Lecture material begins with the 5 super groups 3. Platyhelminthes – Continued a. Bilaterally symmetrical, body plan b. Nervous tissue, sensory organs – ganglion, brain c. Rear/posterior end d. Belly – ventral surface e. Back – dorsal surface f. Reproductive organs/systems, polyembryony – larval asexual reproduction g. Excretory and central nervous systems 4. Nematoda – nematodes or roundworms a. Long and thin, less than 1 mm to over 1 meter b. Complete digestive tract – mouth, other structures, anus c. Monoecious, dioecious d. Freeliving/parasitic e. Longitudinal muscles under body wall and external cuticle f. Tube within a tube body plan g. Pseudocoelom – false body cavity – body cavity but it is not lined with tissue of mesodermal origin h. Three germ layers- produce a variety of structures – mesoderm, ectoderm, endoderm i.
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BS 110 Notes 11-3-2010 - BS 110 Notes 11-3-2010 Exam 3:...

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