What Is Life? A Guide to Biology with Physiology
4th Edition
ISBN: 9781319065447
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 12, Problem 8SA
Summary Introduction
To review:
The difference between background extinctions and mass extinctions.
Introduction:
Extinction refers to the dying out of a whole species; the species no longer exists.
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What the difference between background extinction and biological extinction?
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Distinguish between background extinction and mass extinctions.
Chapter 12 Solutions
What Is Life? A Guide to Biology with Physiology
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- HOW MANY YEARS AGO DID THE MOST RECENT EPOCH BEGIN? HOW MANY MASS EXTINCTION EVENTS HAS EARTH WITNESSED SO FAR?arrow_forwardIf a sixth extinction event is occurring, how is it similar or different from the previous five mass extinctions? What sort of evidence do you think scientists look for to determine whether we are living through a mass extinction?arrow_forwardWhich of the mass extinctions was the largest? What percentage of life went extinct during that time?arrow_forward
- According to Figure 2 above, how many extinction events contributed to the end-Ordovician mass extinction and when did they occur?arrow_forwardWHAT IS MASS EXTINCTION? HOW DID MASS EXTINCTION EVENTS INFLUENCE EARTH'S HISTORY?arrow_forwardWhat are the five mass extinctions of the past and the current theory of the sixth mass extinction? For each extinctions, what caused the extinction and how was ecosystem stability impacted? Was there any speciation that occurred afterward?arrow_forward
- What is the role of mass extinctions to evolution?arrow_forwardWhich eon has more events occurring in it? During which eon did life evolve? What is the difference between background extinctions and mass extinctions?arrow_forwardThe best studied of the mass extinctions is the Cretaceous extinction. Why do you think it has been better studied than the other extinctions?arrow_forward
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