'Permian extinction' diaporamas de présentation

What does it mean for an organism to be extinct?

"If most of us are ashamed of shabby clothes and shoddy furniture, let us be more ashamed of shabby ideas and shoddy philosophies... It would be a sad situation if the wrapper were better than the meat wrapped inside it." Albert Einstein. What does it mean for an organism to be extinct?.

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Big Idea 1

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Mesozoic Life

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Fossils and Evolution

Fossils and Evolution. Amazing Events in Life History. Sex - Who Needs It? We are a team - Mitochondria The Great Freeze 900-600 m.y. ago What survived and how? Mass Extinctions Dinosaurs = 4th worst Permian extinction (220 m.y. ago) took out 90% of all species. Mass Extinctions.

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1) stasis

1) stasis. A) is an essential part of the gradualist model of evolution B) refers to morphological stasis, not molecular stasis C) suggests strong directional selection D) is more likely in dueterostomes E) none of the above. 2) You are:. A) a deuterostome B) a protostome

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