19OriginAnimalsSpr11Post

19OriginAnimalsSpr11Post - (E pluribus unum) 2 The Origin...

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Unformatted text preview: (E pluribus unum) 2 The Origin of Animals Eukaryote Diversity ! You are here Goals of the next three lectures ! 1) _______ the Tree of animal evolution ! Origins, evolution of major features/capabilities ! 2) General diversity of animals ! How are animals 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) Whats are animals? What do they do? Animal relationships Metazoa - From where? AKA Putative Porifera from the periphery of paraphyly ! Animals have their origins among the protists ! In particular, Choanoflagellates ! Colonial tendency ! Sequence similarity ! Very similar to collar cells of _________! Fig. 31.11a Origin of Multicellularity What and Why? ! Multicellularity - Coordination required for some key function ! Boundaries fuzzy ! Why? The Pre-Cambrian Fossil record ! Life by approximately 3.5 bya ! Eukaryotes by about 2.7 bya ! Not too much diversity until about 1.2 bya ! Some examples of non-animalian multicellularity over 1 bya C&R 26.3a Animal relationships Metazoa - From where? AKA Putative Porifera from the periphery of paraphyly ! Animals have their origins among the protists ! In particular, Choanoflagellates ! Colonial tendency ! Sequence similarity ! Very similar to collar cells of _________! Fig. 31.11a Origin of Multicellularity What and Why? ! Multicellularity - Coordination required for some key function ! Boundaries fuzzy ! Why? The Pre-Cambrian Fossil record ! Life by approximately 3.5 bya ! Eukaryotes by about 2.7 bya ! Not too much diversity until about 1.2 bya ! Some examples of non-animalian multicellularity over 1 bya C&R 26.3a The Pre-Cambrian Fossil record ! Animals?...
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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.

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19OriginAnimalsSpr11Post - (E pluribus unum) 2 The Origin...

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