The ______ suggests that natural selection will favor pathogens that can overcome the defences of an increasing proportion of asexuals within a sexual population, eventually causing the decline of asexuals, A. search cost hypothesis B. multiple niche model C. Red queen hypothesis D. unpredictability model

The ______ suggests that natural selection will favor pathogens that can overcome the defences of an increasing proportion of asexuals within a sexual population, eventually causing the decline of asexuals, A. search cost hypothesis B. multiple niche model C. Red queen hypothesis D. unpredictability model

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

Chapter19: Evolutionary Change In Populations

Section: Chapter Questions

Problem 8TYU

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In some bird species, the female chooses a mate that is mostsimilar to her in size. This supportsa. the good genes hypothesis.b. the runaway hypothesis.c. the sexual dimorphism hypothesis.d. All of these hypotheses could be true.e. None of these hypotheses are true.
How does sexual selection differ from natural selection? a. It does not require heritable traits. b. It determines which individuals get to mate. c. Variation is not required. d. It only involves males.
Alternatively, selection may be performed during mating, where mating is done after a selection process of one of the sexes. The surviving individuals can pass on their (1) to the next generation. When these variations are sustained over a long time and the population changes so that it can no longer (2) with the parent population, a new species is said to have evolved.
Evolution that results because certain genotypes have a higher reproductive success is based on a. genetic variation. c. genetic drift. b. natural selection. d. both a and b.
Which statement about prezygotic barriers is false? A.They can arise from the evolution of the structure of sexual organs. B.They can arise from the specific interaction of plants with insect pollinators. C.They can arise from mate selection behaviors. D.They can arise from low fertility of hybrids.
When it comes to adaptation, survival of a species' trait through artificial selection depends on a) which trait is the fittest for the environment b) which trait humans desire to reproduce c) which trait is the oldest for the species d) which trait has more abundance in the population
Two different species cannot occupy the same niche in the same geographic area. If they do they will compete with one another for the same food and other resources. Eventually, one species will out compete the other. This is an example of natural selection. A) True B) False
Mutation is the only evolutionary mechanism that: A. always causes decreased fitness B. is not mentioned by the Hardy-Weinberg model C. is more important in eukaryotes than in prokaryotes D. does little to change allele frequencies on its own E. has no effect on genetic variation.
Under a simple model, the evolution of asexual reproduction strategies will take over a population. The model relies on two assumptions. Which of the following are the assumptions? a. Reproductive mode does not affect how many offspring are produced by a female. b. Reproductive mode does not affect the sexual selection on males c. Reproductive mode does not affect the probability of offspring survival d. Both a. and b. e. Both a. and c.
Your friend remarks, “The giraffe stretched its neck while reaching for higher leaves; as a result, its offspring inherited longer necks.” Which statement is the BEST response to correct your friend’s misconception? A. overproduction of offspring leads to a struggle for survival B. characteristics acquired during an organism’s life are generally not passed on through genes to its offspring C. only favorable adaptations have survival value and unfavorable adaptations are removed from the population D. disuse of an organ may lead to its eventual disappearance
EVOLUTION LINK Examine Figure 20-2c and predict which date is likeliest for researchers to have collected wood frogs and leopard frogs and interbred them in the lab: March 10, April 1, or April 15. Explain your answer. (c) Graph of peak mating activity in wood and leopard frogs. In nature, wood and leopard frogs do not interbreed.
If gene flow between two populations stops, which of the following could occur given enough time? a. speciation b. the population each gain unique alleles c. the timing of reproduction changes ending their ability to interbreed d. frequencies of alleles shift in different ways e. these are all things that could occur if gene flow between two populations of one species ended, given enough time