EBK BIOLOGY
5th Edition
ISBN: 9780100667976
Author: Maier
Publisher: YUZU
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Chapter 11, Problem 4LTB
Summary Introduction
Introduction:
Darwinism is a theory of evolution which states that all the species of organisms arise and develop through natural selection of certain small and inherited variations, which increase the ability to compete, survive and reproduce.
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Which of the following statements is NOT an observation or inference on which natural selection is based?
Group of answer choices
Only a fraction of an individual’s offspring may survive.
Species produce more offspring than the environment can support.
There is heritable variation among individuals.
Modifications of an organism acquires during its lifetime can be passed to its offspring.
Which of the following statements about the forces that drive evolution is TRUE?
Unlike the other evolutionary forces, natural selection is the only force that improves the match between the organism and its environment.
Unlike the other evolutionary forces, gene flow is the only force that causes populations to become more different.
Unlike the other evolutionary forces, mutation is the only force that decreases genetic variability.
Unlike the other evolutionary forces, nonrandom mating is the only force that changes allele frequency.
Which of the following are true of natural selection?
Group of answer choices
it is a variational process
it is a linear process
it decreases genetic diversity in populations
it is a random process
it is a transformational process
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- Charles Darwin and Alfred Russel Wallace accepted all of the following claims about evolution by means of natural selection, with the exception of: over time, the species will evolve as the more fit individuals replace the less fit individuals species can produce more offspring than the environment can sustain those individuals that are more fit will survive and reproduce in the greatest numbers variation is present among individuals of all species all individuals within a species have equal chances to improve their fitnessarrow_forwardWhich of the following is true about natural selection? Group of answer choices it acts on individuals it typically does not involve changes in genotype frequencies in a population it involves individuals willfully changing their genotype and/or phenotype in order to become better matched to their environment and leave more offspring it is a random process it involves humans increasing the frequency of desirable traits in a species by selecting which individuals breedarrow_forwardWhich of the following is the hypothesis that individuals who possess favorable traits are more likely to survive and reproduce than those who possess less favorable traits? genetic drift gene flow mutation natural selectionarrow_forward
- Which of the below is NOT a component of natural selection? Group of answer choices Differential reproduction generated by human breeding. Variation is heritable. Variation among individuals. Differential reproduction among phenotypes.arrow_forwardAccording to the Hardy-Weinberg Equilibrium Equation, all of the following slow down or stop evolution EXCEPT (choose as many as apply): Group of answer choices very small population very large population no one leaves or comes into the population everyone has equal numbers of offspring there are no mutations there are lots of mutations there is non- random matingarrow_forwardThe process of natural selection can be described as Group of answer choices 1. an organism changing during its life to be better suited for its environment 2. a cell dividing 3. traits that cause individuals to live longer or reproduce more are seen more often in the next generation 4. none of the abovearrow_forward
- Which of the following best explains the phrase “survival of the fittest” in terms of evolution by natural selection? The strongest and fastest individuals will always survive and reproduce more often. The individuals that are the healthiest will always get more resources and survive better. Only individuals that have the most mates will survive with limited resources. The individuals that survive better and reproduce more often will pass their traits on more often.arrow_forwardWhich of the following is not true of natural selection? (a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traits acquired during an individuals lifetime (d) natural selection acts on a populations genetic variability, which arises through mutation (e) natural selection may result in changes in allele frequencies in a populationarrow_forwardNatural selection can be defined as: chance differences in organism traits. the chance for species numbers to increase rapidly. the processes that lead individuals to resemble their parents. the differential survival and reproduction of individuals. the genetic fixation of species.arrow_forward
- What causes variation among a population of living things and How can variation in one generation influence the next generation? Is the variation in a population will be examined as the “raw material” upon which natural selection acts. Why are there so many different kinds of living things? Comparing species that exist today reveals a lot about their relationships to one another and provides evidence of common origins. This session explores the theory of evolution: change in species over time.arrow_forwardThe offspring of better-adapted individuals are expected to make up a larger proportion of the next generation. Which mechanism of evolution best explains this event? Group of answer choices gene flow and genetic drift mutations and genetic drift mutations and nonrandom mating mutations and natural selectionarrow_forwardList the premises of evolution by natural selection. What is the inevitable outcome?Variation; heritability; “struggle”/context; differential survival/reproductionarrow_forward
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