BIO 1406/07 BK/LAB/CODE PREPACK
12th Edition
ISBN: 9781265538590
Author: Raven
Publisher: MCG
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Textbook Question
Chapter 20, Problem 7U
For natural selection to result in evolutionary change
a. variation must exist in a population.
b. reproductive success of different
c. variation must be inherited from one generation to the next.
d. All of the choices are correct.
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In Darwin's theory of natural selection, which of the following is a source of evolution:
a.
Individuals with random mutations who die without reproducing.
b.
Individuals with random mutations who are able to reproduce.
c.
Individuals who do not vary from their progenitors.
d.
Intelligent and purposeful design.
Which of the following is an example of stabilizing selection?a. Over time, Equus developed strength, intelligence, speed,and durable grinding teeth.b. British land snails mainly have two different phenotypes.c. Swiss starlings usually lay four or five eggs, therebyincreasing their chances of more offspring.d. Drug resistance increases with each generation; theresistant bacteria survive, and the nonresistant bacteriaget killed off.e. All of these are correct
Which of the following individuals would be considered to have the greatest evolutionary fitness?
a. Olympic speed skater with one child
b. an overweight person with three children
c. a woman who had six children, none of whom (the children) survived to adulthood
d. a single mom who adopted eight children
Chapter 20 Solutions
BIO 1406/07 BK/LAB/CODE PREPACK
Ch. 20.1 - Define evolution and population genetics.Ch. 20.1 - Prob. 2LOCh. 20.2 - Explain the HardyWeinberg principle.Ch. 20.2 - Describe the characteristics of a population that...Ch. 20.2 - Prob. 3LOCh. 20.3 - Define the five processes that can cause...Ch. 20.3 - Prob. 2LOCh. 20.4 - Prob. 1LOCh. 20.4 - Prob. 2LOCh. 20.4 - Demonstrate how the success of different...
Ch. 20.5 - Prob. 1LOCh. 20.5 - Prob. 2LOCh. 20.5 - Prob. 3LOCh. 20.6 - Define frequency-dependent selection, oscillating...Ch. 20.6 - Prob. 2LOCh. 20.7 - Define and contrast disruptive, directional, and...Ch. 20.7 - Prob. 2LOCh. 20.8 - Explain how experiments can be used to test...Ch. 20.9 - Prob. 1LOCh. 20.9 - Prob. 2LOCh. 20.10 - Prob. 2LOCh. 20 - If all white cats died, what proportion of the...Ch. 20 - Assuming that the values on the x-axis represent...Ch. 20 - Prob. 3DACh. 20 - Prob. 4DACh. 20 - Examine the index of copper tolerance on nonmine...Ch. 20 - Prob. 6DACh. 20 - Why are rare alleles particularly likely to be...Ch. 20 - Prob. 2IQCh. 20 - Prob. 3IQCh. 20 - Prob. 4IQCh. 20 - Prob. 5IQCh. 20 - Prob. 6IQCh. 20 - Prob. 7IQCh. 20 - Prob. 8IQCh. 20 - Prob. 9IQCh. 20 - Assortative mating a. affects genotype frequencies...Ch. 20 - When the environment changes from year to year and...Ch. 20 - Many factors can limit the ability of natural...Ch. 20 - Stabilizing selection differs from directional...Ch. 20 - Founder effects and bottlenecks are a. expected...Ch. 20 - Relative fitness a. refers to the survival rate of...Ch. 20 - For natural selection to result in evolutionary...Ch. 20 - Prob. 8UCh. 20 - In a population of red (dominant allele) or white...Ch. 20 - Genetic drift and natural selection can both lead...Ch. 20 - Prob. 3ACh. 20 - Prob. 4ACh. 20 - In Trinidadian guppies a combination of elegant...Ch. 20 - On large, black lava flows in the deserts of the...Ch. 20 - Based on a consideration of how strong artificial...
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- Which of the following most accurately describes mutations? a. They typically have immediate and impactful evolutionary effects on populations. b. They are required for all populations to evolve. c. They are always deleterious. d. They occur so infrequently that most populations to harbor very little variation.arrow_forwardIn Darwin's theory of natural selection, which of the following is a source of evolution: a.Individuals who do not vary from their progenitors. b.Intelligent and purposeful design. c.Individuals with random mutations who are able to reproduce. d.Individuals with random mutations who die without reproducing.arrow_forwardWhich of the following is correct regarding the process ofevolutionary change?a. an adapted individual is the one that survives and passes on itsgenes to offspring.b. changes in phenotype are passed on by way of the genotype tothe next generation.c. organisms are able to bring about a change in their phenotype.d. evolution is striving toward particular traits.e. All of these are correct.arrow_forward
- In the movie on rock pocket mice, what did the team discover about black colouration? Select the ONE BEST answer. a. Fur colouration is the result of a new adaptive behaviour where pocket mice rolled in lava dust to camouflage themselves. b. It is the result of the same, single mutation in all populations. C. Different mutations cause similar dark colouration in different populations. d. One specific mutation causes black or white fur depending on the population. e. Fur colouration is the result of dietary changes in different environments, not natural selection.arrow_forward1) What does the term Natural Selection mean? Select one: a.The number and relative frequency of alleles present in a particular population. b.The process through which individuals with certain traits tend to produce more surviving offspring that individuals without those traits. c. Any change in the hereditary material of an organism.arrow_forwardWhat is the difference between evolution, natural selection, and artificial selection? A. Evolution is a genetic change in a population over time which can occur through natural selection. Artificial selection is the differential reproduction of individuals in a population to promote the characteristics chosen by the breeder. B. Natural selection is the change of allele frequencies in a population over time. Evolution leads to differential survival and reproduction of individuals. Artificial selection has produced domesticated animals and plants. C. Evolution is a mechanism of artificial selection. Natural selection is a form of artificial selection in which nature selects the characteristics that are most beneficial to a species. D. Artificial selection is a mechanism of evolution and is the main process of domesticating animals and plants for human use. Natural selection is the same as evolution.arrow_forward
- Environments all over the world are changing as a result of global warming. Will this cause natural selection to occur? A. No.The environment is always changing. Global warming is nothing new. B. Yes, warmer temperatures will induce mutations that are favorable to survial in the new teperature regime C. No. The only change will be that species from hot environments will expand their ranges. D. Yes. Traits that help individuals produce more offspring in warmer environments will increase in frequency. E. Yes. Warmer temperatures will increase the rate of chemical reactions in poikilothemic species and thus natural selection will be enhanced.arrow_forwardWhich of the following conclusions are MOST likely to be supported by genetic evidence? A. Some modern-day organisms did not exist in the past. B. Some organisms found in the fossil record do not currently exist. C. Environmental change affected the fitness of individuals differently based on their traits. D. Some disease-causing traits may remain in a population because their alleles provide an advantage to heterozygotes.arrow_forwardWhat is neutral evolution? A. Neutral evolution does not exist. B. When certain genes are present or absent in populations due to natural selection (they are advantageous or disadvantageous). C. When certain genes are present or absent in populations regardless of selection (they are not advantageous or disadvantageous). D. When certain genes are present or absent in populations due to sexual selection (they are selected for by the opposite sex).arrow_forward
- What is true about evolution by natural selection? a. It is a largely random process. b. Homology shows that convergence is a useful tool for deducing adaptive function. c. Mothers are invariably members of the same species as their offspring, so selection can never create new species. d. Harmful recessive genes are eliminated more rapidly than harmful dominant genes. e. None of the above is true.arrow_forwardThe good genes hypothesis is a theory that explains what? a. why more fit individuals are more likely to have more offspring b. why alleles that confer beneficial traits or behaviors are selected for by natural selection c. why some deleterious mutations are maintained in the population d. why individuals of one sex develop impressive ornamental traitsarrow_forwardIndicate whether each of the following statements about natural selection is true (T) or false (F). Put either a T or an F in each box provided. a. Natural selection alters a population's gene pool b. Natural selection creates new alleles which increase the reproductive success of their owners c. Natural selection favors traits which it anticipates will be beneficial to a species in the future d. Natural selection can at times be observed in nature over the course of just a few decades e. Natural selection acts directly on an individual's phenotypearrow_forward
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