Chapter 32 Dr. Gleason - Dr. Gleason Chapter 32: Intro to...

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Chapter 32: Intro to Animal Diversity General Characteristics of Animals o Multicellular o Heterotrophic: can’t make own food, depend on food source other than self o Structural proteins (collagen): b/c animal cells don’t have cell wall, must maintain structure by collagen o Impulse conduction and movement (nervous and muscle tissue) o Require O 2 for respiration o Reproduce sexually (mostly) and/or sexually o Mobile for at least part of life cycle o Life cycle with embryonic period (development through mitotic divisions: cleavage) Embryonic development Fig. 32.2 What makes sure parts are in the right spots? o Homeobox genes (in all eukaryotes) Produce regulatory proteins o Hox genes (homeobox genes in all animals) Control cell division and differentiation Highly conserved, number increases with animal complexity Important Points!!! o Evolution of animals may have begun 1.5 billion years ago. o
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This note was uploaded on 08/21/2008 for the course BIOL 2108 taught by Professor Leege,gleason during the Spring '08 term at Georgia Southern University .

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Chapter 32 Dr. Gleason - Dr. Gleason Chapter 32: Intro to...

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