Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Chapter 43, Problem 5TYU
Summary Introduction
Introduction:
The extinction vortex can be defined as the major reduction in the
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An extinction vortex describes
a) changes in a population’s gene pool that lead to a loss in fitness across time.
b) a species ability to adapt to changes in their environment.
c) the continuous series of extinctions caused by competition between species.
d) a population that has a reduction in fitness because it cannot escape a Hardy-Weinberg Equilibrium.
The human population is over 7 billion, and yet estimates of its genetic diversity indicate a population closer to 50 000. What could account for that discrepancy?
a. industrial farming
b. habitat loss
c. the population is reaching carrying capacity
d. an historical genetic bottleneck
One characteristic that distinguishes a populationin an extinction vortex from most otherpopulations is that(A) it is a rare, top-level predator.(B) its effective population size is lower than itstotal population size.(C) its genetic diversity is very low.(D) it is not well adapted to edge conditions.
Chapter 43 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
Ch. 43.1 - Prob. 1CCCh. 43.1 - Prob. 2CCCh. 43.1 - WHAT IF? Imagine two populations of a fish...Ch. 43.2 - How does the reduced genetic diversity of small...Ch. 43.2 - Prob. 2CCCh. 43.2 - WHAT IF? In 2005, at least ten grizzly bears in...Ch. 43.3 - Prob. 1CCCh. 43.3 - Prob. 2CCCh. 43.3 - Prob. 3CCCh. 43.4 - How can the addition of excess mineral nutrients...
Ch. 43.4 - MAKE CONNECTIONS There are vast stores of organic...Ch. 43.5 - Prob. 1CCCh. 43.5 - Prob. 2CCCh. 43.6 - Prob. 1CCCh. 43.6 - Prob. 2CCCh. 43.6 - WHAT IF? Suppose a new fishery is discovered, and...Ch. 43 - One characteristic that distinguishes a population...Ch. 43 - Prob. 2TYUCh. 43 - Prob. 3TYUCh. 43 - Prob. 4TYUCh. 43 - Prob. 5TYUCh. 43 - Prob. 6TYUCh. 43 - DRAW IT (a) Estimate the average CO2 concentration...Ch. 43 - Prob. 8TYUCh. 43 - FOCUS ON EVOLUTION The fossil record indicates...Ch. 43 - Prob. 10TYUCh. 43 - SYNTHESIZE YOUR KNOWLEDGE Big cats, such as the...
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- Environments with low frequency and intensity of disturbance tend to have ________ species diversity because ______. Group of answer choices A) low; the best competitors exclude any other species B) high; disturbances kill off a large number of individuals C) low; there are fewer late-successional species than early-successional species D) high; more species can colonize over a longer period of time Question: Answer choice selection is either: Burkina Faso or Italy for all three answer choicesarrow_forwardRabbits are important grazers, maintaining some important grassland habitats. If a catastrophe were to reduce rabbit populations what would happen? * a. There would be more grass for the surviving rabbits b. The grassland would be invaded by trees and shrubs c. All of the abovearrow_forwardIf extinction is a natural part of life on Earth, why should we care about protectingendangered species Explainarrow_forward
- . Which of the following represents the permanent loss of a species?a. natural selection c. extinctionb. greenhouse effect d. climate changearrow_forwardThe American Bison was hunted to near extinction by early settlers. Which answer is correct about the current population of American Bison? chose the correct answer(s) a.It has experienced a population bottleneck. b.It is more genetically diverse. c.It has experienced the founder effect. d.Both a. and b. e.Both b. and c.arrow_forwardThe main arguments against the overkill hypothesis of megafauna extinction are a. Lots of species other than megafauna went extinct b. Rapid climate change destroyed the habitat that the megafauna depended on c. Many megafauna in North America went extinct before humans arrived d. All of the abovearrow_forward
- Why are species that live at the tops of mountains at increased risk of extinction due to climate change? a. The colder temperatures at the tops of mountains gradually increase, and the species at the tops of the mountains are displaced by species at lower elevations moving up. b. The species at the tops of the mountains are adapted to moving up and down the mountains and species at lower elevations are displacing them as they move down the mountains. c. The species at the tops of the mountains are adapted to lower oxygen and climate change increases oxygen content in the air. d. Species at the tops of mountains do not have the genetic diversity for adaptation that lower-elevational species do. Therefore species at the tops of the mountains are more likely to go extinct.arrow_forwardWhat is Microevolution? A) The change of a population over several generations B) The history of a species from its origin C) The history of all populations and their descendantsarrow_forwardWhich of the following is an example of the founder effect? a.) Northern elephant seals were hunted to near extinction, but populations later rebounded. b.) None of the answers are correct c.) A plant seed established a new population after hitching a ride on a migratory bird d.) All of the answers are correct e.) A late frost killed 95% of a local population of spring ephemeral plantsarrow_forward
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