'Many reptile groups' presentation slideshows

Wednesday October 27, 2010

Wednesday October 27, 2010. ( The Phanerozoic Eon ). The Launch Pad Wednesday, 10/27/10. The beginning of the Cambrian period marks an important event in animal evolution, the appearance of organisms with __________________. wings cells shells and other hard parts vertebrae

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Chapter 12

424 views • 34 slides

Warm Up 1/9/09

Warm Up 1/9/09. What important event in animal evolution marks the beginning of the Cambrian? a. the ability to fly b. the ability to swim c. the appearance of fossils d. the appearance of hard parts What event may have triggered the great Paleozoic extinction?

323 views • 24 slides