Animal Diversity I - Animal Diversity I What is an animal?...

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Animal Diversity I 04/03/2008 17:28:00 What is an animal? Muticellular Develop from single cell zygote Heterotrophic Break down food internally o Vs. Fungi which break down externally Most move with mucles Animal Synapomorphies (Shared derived characters) Gene sequences Hox genes o Develoment o Segmentation Cell junctions o Tight junctions o Desmosomes o Gap junctions Extracellular matrix proteins o Outside cell, provides structure Collagen Proteoglycans o Makes up bone, cartilage o Barriers and filters o NOT the same as a cell wall Common anscestor Flagellated protist Similar to colonial choanoflagellates o Members of the colony began to specialize o Evolution of multicellularity
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Multicellular Animal Origins 04/03/2008 17:28:00 Protostomes
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Lophotrocozoans o Grow by adding  Ecdysozoans o Grow by  molting Deuterostomes o Have  internal skeletons Simple animals Profira o Sponges o Orgainzed into a tube Water passes through tube w/nutrients Absorb nutrients directly into the cell
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This note was uploaded on 04/03/2008 for the course ECOL 182 taught by Professor Chesson during the Spring '08 term at University of Arizona- Tucson.

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Animal Diversity I - Animal Diversity I What is an animal?...

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