What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 8, Problem 9MC
Summary Introduction
Introduction:
Evolution is the process of change in the allelic frequency population that drives an organism to better survival adaptions.
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Students have asked these similar questions
All evolutionary changes that allow a species to change in response to the environment are originally a result of
A) beneficial DNA mutations.
Eliminate
B) movement to new environments where survival is easier.
C) cross-breeding with other species of closely related organisms.
D) adaptations that organisms make to the environment during their lifetimes.
Not Graded
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…
Which of the following is correct concerning adaptations? (Choose one.)
Group of answer choices
a)They always increase an organism's ability to survive better than other individuals in the population.
b)They can increase an organism's ability to survive better or reproduce better than other individuals, but not both at the same time.
c)They increase an organism's ability to reproduce better than other individuals in the population, in a given environment.
d)They result from any mechanism of evolution.
Chapter 8 Solutions
What is Life? A Guide to Biology with Physiology
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- Which of the following statements is most accurate? a) Humans evolved from chimpanzees. O b) If allele frequencies change across generations in a population, natural selection must be the cause. c) An individual evolves in response to a change in environment. d) Mutation is the ultimate source of new alleles, but the fate of such mutations depends in part on how they impact fitness. e) All traits are adaptations, although for some we haven't yet figured out what they are adaptations for.arrow_forwardTrue or False a.) Evolution creates genetic variation in a population. b.) Fitness refers to an allele's ability to help the organism evade predators. c.) The process of natural selection may increase or decrease the frequency of a particular allele in the population depending on the environment. d.) A potato species acquires a mutation in its catalasegene that allows it to function in very cold environments. However, this catalaseis denatured at room temperature. This is a good example of fitness cost.arrow_forward6) The lens of the vertebrate eye develops only after the head ectoderm comes in contact with the optic cup. This is an example of A) Determination B) Differentiation C) Pattern formation D) Induction 5) The evolutionary process most likely to account for the fixation of neutral or even non-adaptive genes or gene combinations in small populations is called A) Darwinian selection B) Recombination C) Mutation D) Genetic driftarrow_forward
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