Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
11th Edition
ISBN: 9781488687075
Author: Lisa, A. Urry
Publisher: PEARSON
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Chapter 56, Problem 8TYU
Summary Introduction
To determine: The history of mass extinction and how to prevent the sixth mass extinction.
Concept introduction:
Mass extinction is a method of the nature through which it decreases the diversity of organisms in nature. It approaches when the species diversity declines gradually and eventually nature finds a way to eliminate the existing diversity.
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Is extinction normal? Explain. What is NOT normal about it now? Why is the loss of biodiversity so crucial to Earth and us?
There have been five main mass extinctions. Match each mass extinction event to its description.
1.
Permian extinction
2.
Cretaceous-Tertiary extinction
3.
Triassic extinction
4.
Devonian extinction
5.
Ordovician extinction
a.
This extinction was most likely due to a change in sea level. During this event, about 60% of all marine species were eliminated.
b.
This is the best-known mass extinction. It eliminated most large animals, including the dinosaurs.
c.
This was the most severe extinction event. About 96% of life on Earth died during this event.
d.
This extinction was most likely caused by climate change. About 80% of land animals died during this event.
e.
This extinction was most likely due to a change in sea level. It especially affected coral reefs.
The graph below shows the population of three different families of marine organisms along five different mass extinction events. Each colour on the graph represents a family of organisms, and the Y axis shows how many species belong to that family.
a. What stage of population growth is displayed at point ‘0’ on the graph above?
b. The Extinction Event that occurred at point 3 was particularly significant. Using the graph, explain how this event impacted each marine family.
c. The extinction events mapped above had significant impact on marine life. What type of event could have a similar impact on the human population?
Chapter 56 Solutions
Campbell Biology: Australian And New Zealand Edition + Mastering Biology With Etext
Ch. 56.1 - Explain why it is too narrow to define the...Ch. 56.1 - Identify the four main threats to biodiversity and...Ch. 56.1 - WHAT IF? Imagine two populations of a fish...Ch. 56.2 - How does the reduced genetic diversity of small...Ch. 56.2 - If there were 100 greater prairie chickens in a...Ch. 56.2 - WHAT IF? In 2005, at least ten grizzly bears in...Ch. 56.3 - Prob. 1CCCh. 56.3 - Prob. 2CCCh. 56.3 - Prob. 3CCCh. 56.4 - How can the addition of excess mineral nutrients...
Ch. 56.4 - MAKE CONNECTIONS There are vast stores of organic...Ch. 56.4 - MAKE CONNECTIONS Mutagens are chemical and...Ch. 56.5 - What is meant by the term sustainable development?Ch. 56.5 - Prob. 2CCCh. 56.5 - WHAT IF? Suppose a new fishery is discovered, and...Ch. 56 - Give at least three examples of key ecosystem...Ch. 56 - Why is the minimum viable population size smaller...Ch. 56 - Prob. 56.3CRCh. 56 - Prob. 56.4CRCh. 56 - Prob. 56.5CRCh. 56 - One characteristic that distinguishes a population...Ch. 56 - The main cause of the increase in the amount of...Ch. 56 - Prob. 3TYUCh. 56 - Which of the following is a consequence of...Ch. 56 - Which of the following strategies would most...Ch. 56 - Of the following statements about protected areas...Ch. 56 - Prob. 7TYUCh. 56 - Prob. 8TYUCh. 56 - SCIENTIFIC INQUIRY (a) Estimate the average CO2....Ch. 56 - WRITE ABOUT A THEME: INTERACTIONS One factor...Ch. 56 - Prob. 11TYU
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