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Unformatted text preview: 1 Announcements Exam on Wednesday, 3/16 Q&A review Tuesday 8:30 - 10:00 am Armory Room 0131 Goals of these three + lectures 1) Tell the Tree of animal evolution Origins, evolution of major features/capabilities 2) General diversity of animals How animals are related? What kinds of things animals can animals do and why are these things important? (ecology/evolution/physiology) Why? To provide a phylogenetic and functional context for discussing the Fundamental Processes of Life (BSCI207 - Part II) Previously (Bring notes from last time) Porifera Multicellular, but protist like in many ways Cnidaria Radial symmetry, Nervous systems, tissue layers Few specialization related to direction, high MR Bilateria (with Platyhelminthes as an example) Directionality, Cephalization, Bilateral Symmetry,Mesoderm Protostomes Annelids Today, continue Protosomes (molluscs, Arthropods), plus Remarkable convergence in the two major groups of Bilateria - Protostomes and Deuterostomes Remember themes: Mobility, Land, High Metabolic rate Deuterostomes Divergent paths 2 Deuterostomes Divergent paths Includes Echinoderms Chordates United by Blastopore -> Anus Details of mesoderm and coelom formation Echinoderms - Body Plan A reversal of just about every trend so far! Lose bilateral symmetry Become secondarily radial Become slow Reduce muscle Reduce sense organs Decentralize nervous system De____________!!! Echinodermata - Body Plan A reversal of just about every trend so far!...
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This note was uploaded on 02/01/2012 for the course BSCI 207 taught by Professor Higgins during the Spring '08 term at Maryland.
- Spring '08