Which of the following promotes adaptive evolution in populations? A)High genetic diversity B)Selection pressure for an environmental factor that is changing C)Greater survival and reproduction in organisms with inherited traits D)All of the above At what rate do adaptations occur in populations? A)Adaptations occur slowly, due to very low mutation rates. B)Adaptations occur quickly, due to the ability of organisms to quickly acquire traits from their environment. C)Adaptation rates can be fast when selection pressures are strong. D)Adaptation rates are always slow, due to genetic drift. Gene flow among populations results in which impact on adaptation? A)It increases the occurrence of adaptation by introducing new genes. B)It slows the process of adaptation by introducing alleles that keep the population from being dominated by the alleles best suited for the environment. C)It increases the occurrence of adaptation by moving traits acquired from the environment to all populations. D)Both a and b Which of the following can limit the degree to which populations can adapt to their environment? A)Traits that may be beneficial for one function may be detrimental for another (ecological trade-off). B)Genetic diversity can be low. C)The traits best suited to the environment may be missing from the pool of genetic diversity. D)All of the above Speciation may occur when populations are isolated, due to which of the following?

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter57: Biological Diversity And Conservation Biology

Section: Chapter Questions

Problem 11TYU: Why might captive-breeding programs that reintroduce species into natural environments fail?

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Which of the following promotes adaptive evolution in populations?

A)High genetic diversity

B)Selection pressure for an environmental factor that is changing

C)Greater survival and reproduction in organisms with inherited traits

D)All of the above

At what rate do adaptations occur in populations?

A)Adaptations occur slowly, due to very low mutation rates.

B)Adaptations occur quickly, due to the ability of organisms to quickly acquire traits from their environment.

C)Adaptation rates can be fast when selection pressures are strong.

D)Adaptation rates are always slow, due to genetic drift.

Gene flow among populations results in which impact on adaptation?

A)It increases the occurrence of adaptation by introducing new genes.

B)It slows the process of adaptation by introducing alleles that keep the population from being dominated by the alleles best suited for the environment.

C)It increases the occurrence of adaptation by moving traits acquired from the environment to all populations.

D)Both a and b

Which of the following can limit the degree to which populations can adapt to their environment?

A)Traits that may be beneficial for one function may be detrimental for another (ecological trade-off).

B)Genetic diversity can be low.

C)The traits best suited to the environment may be missing from the pool of genetic diversity.

D)All of the above

Speciation may occur when populations are isolated, due to which of the following?

A)Geographic isolation that promotes genetic divergence among populations

B)Evolutionary divergence, such as adaptation

C)Mass mutations within a population

D)Both a and b

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Introduction

Evolution in biology can be mostly simply described as descent with modifications, which comprises of evolutionary changes at genetic, organismal or population level. Evolution helps us to understand the history of life since the first advent of life on earth (almost 3.7 billion years ago) till present. Living organisms and fossils have evolved since billions of years and present-day species have all evolved from a common ancestor and then have diverged at different points of time during the evolution of life. Evolution reflects organisms' adaptations to changing environments, and it can result in altered genes, new traits, and speciation. Natural selection, mutation, genetic drift, and gene flow are the four main evolutionary processes.

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