Review Questions




BIO372 : Extinction : Mass Extinctions : Review Questions

Mass Extinctions: Review Questions

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1. Species have been going extinct over the entire history of the earth.

a) What is background extinction?

b) What is a mass extinction and what distinguishes it from background extinction?

2. It seems that warm water marine organisms have suffered most during mass extinctions and cold water forms least. What explanation is there for this difference?

3. Several kinds of evidence have been used to support explanations (hypotheses) for mass extinctions.

a) What is iridium and how is it related to explanations of extinction episodes?

b) What is quartz and how is it related to explanations of extinction episodes?

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