Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 18.5, Problem 2CYL
- describe the likely causes of mass extinctions in general and of the one that occurred 66 million years ago in particular?
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Distinguish between background extinction and mass extinctions.
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Chapter 18 Solutions
Biology
Ch. 18.1 - How Would the experiments result charge if oxygen...Ch. 18.1 - describe a likely scenario for the origin of life?Ch. 18.1 - describe, for each step in the scenario, some...Ch. 18.2 - Uranium-235, with a half-life of 713 million...Ch. 18.2 - Scientists have identified a free living bacterium...Ch. 18.2 - describe scenarios for the major evolutionary...Ch. 18.2 - State the order in which these events occurred,...Ch. 18.3 - describe fossil evidence of the earliest...Ch. 18.3 - describe the advantages that fostered the origin...Ch. 18.3 - Prob. 3CYL
Ch. 18.4 - Prob. 1TCCh. 18.4 - Does the mudskippers ability to walk on land...Ch. 18.4 - Can ancient DNA reveal the secrets of dinosaur...Ch. 18.4 - Although it may never be possible to recover DNA...Ch. 18.4 - describe the transitions and innovations...Ch. 18.4 - describe the advantages gained by the first plants...Ch. 18.5 - Scientists have cloned a number of animal species,...Ch. 18.5 - explain how extinction has affected the course of...Ch. 18.5 - describe the likely causes of mass extinctions in...Ch. 18.6 - We might be able to more easily distinguish...Ch. 18.6 - Paleontologists recently discovered fossil...Ch. 18.6 - describe the evolutionary history of humans and...Ch. 18.6 - name and describe some characteristics of the...Ch. 18.6 - describe the key features of the most recent phase...Ch. 18.6 - The unexpected discovery that humans interbred...Ch. 18 - Almost all of the oxygen gas in todays atmosphere...Ch. 18 - Extinction a. generally does not occur except...Ch. 18 - In the endosymbiotic origin of the mitochondrion,...Ch. 18 - Which of the following does not list evolutionary...Ch. 18 - Prob. 5MCCh. 18 - Because there was no oxygen in the earliest...Ch. 18 - The molecule _________ became a candidate for the...Ch. 18 - Complex cells that contain a nucleus and other...Ch. 18 - The Sperm of early land plants had to reach the...Ch. 18 - Prob. 5FIBCh. 18 - Prob. 6FIBCh. 18 - Prob. 7FIBCh. 18 - What is the evidence that life might have...Ch. 18 - How did the origin of photosynthesis affect...Ch. 18 - Explain the endosymbiont hypothesis for the origin...Ch. 18 - Name two advantages of multicellularity for plants...Ch. 18 - What advantages and disadvantages would...Ch. 18 - Prob. 6RQCh. 18 - Prob. 7RQCh. 18 - Extinctions have occurred throughout the history...Ch. 18 - In biological terms, what do you think was the...
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- Increases in species diversity arise because of A)increases in the rate of speciation. B)decreases in the rate of extinction. C)higher rates of speciation than extinction. D)All of the above The rates of extinction since the origin of life have followed which pattern? A)Gradual decrease B)Gradual increase C)No change D)Several episodes of mass extinctions, with much lower rates of fluctuating extinctions in between Which of the following statements about the outcome of the evolution of a new species through hybridization is false? A)The new species is always an intermediate of the two parent species. B)The new species may have traits that allow it to inhabit environments different from both parental species. C)The new species may have greater genetic diversity and therefore greater trait diversity than the parental species. D)All of the above How can ecological processes influence the evolution of a population? A)Ecological…arrow_forwardDistinguish between biological extinction and mass extinction. Does every species have the right to survive without human interference, regardless of whether they serve a useful purpose to humans? Explain?arrow_forwardDescribe one of the major extinction events during the Late Paleozoic or Mesozoic (include when it happened, what caused it and what groups of organisms went extinct).arrow_forward
- (A) What is extinction? How extinction is different from expiration? Explain. (B)List the five mass extinction episodes occurred in the history of Earth. Characterize the nature and extent of each extinction episode.arrow_forwardDefine the term extinct. Also explain the phenomenon of mass extinction. In 300 words.arrow_forwardWhich of the following contributed to mass extinctions?a. climate changeb. continental driftc. meteor impactsd. All of these are correct.arrow_forward
- Explain how the broad evolutionary changes seen in the fossil recordare the cumulative result of speciation and extinction events.arrow_forwardDescribe the theories of gradualism and punctuated equilibrium. How can the fossil record support both?arrow_forwardHow have humans influenced extinctions?arrow_forward
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