ISB 2-22-2011 - when green, one-celled act like plants and...

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ISB pgs. 157-170 2-22-2011 17:41 Chapter 7: The Cambrian Explosion What is the Cambrian Explosion? Author said slow fuse Belief in special creation:   God created things simultaneously God could create things sequentially, and could look exactly look like evolution. Begins in stage 3 of the Cambrian, by this stage there is a diversification of animals that  have already existed in Precambrian Most species already existed. Rapid appearance of the major Phyla.  Radiation: rapid evolution, similar to concept of explosion Cordates: they are us No direct line to, but could be on some auxiliary lines. Beginning of the Cambrian Period = 542 million years old. 1 Cell complex organism…differs from a bacteria
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Unformatted text preview: when green, one-celled act like plants and use photosynthesis Algae: fossilized algae found in Cambrian. (Michigan holds oldest known algae) Biggest step in evolution is from prokaryotes to eukaryotes Little bodies in eukaryotes called organelles (each having its own DNA) Protozoa: Single Celled Animal Do not have chlorophyll or chloroplasts Do not photosynthesize. Common Protazoa: Amoeba Testate: having a shel Sponge: Primitive phylum of all animals Next animal fossil occurs in Syberia from drill cores that are 1 bilion years old=Parmia (worm) When did the radiation of the animal kingdom occur? Between 1.5 and 1.0 billion years ago 17:41 17:41...
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This note was uploaded on 10/04/2011 for the course ISB 200 taught by Professor Ralphtaggart during the Spring '09 term at Michigan State University.

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ISB 2-22-2011 - when green, one-celled act like plants and...

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