BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 17, Problem 9SA
Summary Introduction
Introduction:
Natural selection is the phenomenon where the nature itself favors most suitable allele of a gene to increase its frequency in the population. This helps the population to adapt itself according to its needs. During the process of evolution, natural selection plays an important role by favoring the variation that is most suitable to the environment and capable of best survival in that.
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Evolution______ . a. is change in a line of descent b. is the same as natural selection c. is the goal of natural selection d. explains the origin of life
The process in which environmental pressures result in the differential survival and reproduction of individuals of a population is called_____ . a. catastrophism c. natural selection b. evolution d. genetics
Which of the following is false regarding artificial selection?
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Chapter 17 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 17 - _________is the original source of new alleles. a....Ch. 17 - Prob. 2SACh. 17 - Match the modes of natural selection with their...Ch. 17 - Prob. 4SACh. 17 - The persistence of the sickle allele at high...Ch. 17 - Prob. 6SACh. 17 - Prob. 7SACh. 17 - Which of the following is not part of how we...Ch. 17 - Prob. 9SACh. 17 - Prob. 10SA
Ch. 17 - Prob. 11SACh. 17 - Prob. 12SACh. 17 - In evolutionary trees, each node represents an...Ch. 17 - Match the evolutionary concepts. ____gene flow a....Ch. 17 - The evolution of wings helped the insect clade to...Ch. 17 - Species have traditionally been characterized as...Ch. 17 - Rama the cama, a llama-camel hybrid, was born in...Ch. 17 - Two species of antelope, one from Africa, the...Ch. 17 - Prob. 4CT
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- ______is the original source of new alleles. a. Mutation c. Gene flow b. Natural selection d. Genetic driftarrow_forwardRate of evolution by selection is highest for an allele when it is _________ . a. wild type b. recessive c. dominant d. co-dominantarrow_forwardA trait is adaptive if it_____ . a. arises by mutation c. is passed to offspring b. increases fitness d. occurs in fossilsarrow_forward
- How is genetic drift like natural selection? A. They both depend upon the founder effect B. Both usually bring about adaptation to the environment C. They both cause gene frequency changes D. All of these are correct Mutations are __________. A. The sole source of variation in a sexually reproducing organisms B. The ultimate source of variation in sexually reproducing organisms C. Both genetic and chromosomal in nature D. All of these are correctarrow_forwardThe word “theory” in theory of evolution is best replaced by ________. a. fact b. hypothesis c. idea d. alternate explanationarrow_forward89. Natural selection can best be described as _________. A. differential survival and/or reproduction among heritable entities B. macroevolutionary change C. microevolutionary change which results in new species D. none of the above describe natural selectionarrow_forward
- Which of the following best explains the role mutations play in natural selection?A. Most mutations are negative and result in the extinction of the entire speciesB. Mutations may appear for one or two generations, but they usually disappear quickly.C. If the environment changes, an existing organism develops a mutation that will help them to survive.D. Some mutations give individuals an advantage in their environment, allowing them to survive and reproduce.D is my answer is it correct?arrow_forwardMutations are __________. A. The sole source of variation in a sexually reproducing organisms B. The ultimate source of variation in sexually reproducing organisms C. Both genetic and chromosomal in nature D. All of these are correctarrow_forward1. ____ occurs when allele frequencies change over generation due to random chance. a. extinction b. gene flow c. natural selection d. mutationarrow_forward
- Population genetics is the study of ________. a. how allele frequencies in a population change over time b. populations of cells in an individual c. the rate of population growth d. how genes affect embryological developmentarrow_forwardDarwin’s Theory of Natural Selection occurs in 4 steps.Which of the following is NOT one of these four steps?a. Differentiationb. Selectionc. Competitiond. Overproductionarrow_forwardWhich of the following statements is true? A. Evolution involves a change in gene frequencies from one generation to the next B. Natural selection is the only mechanism through which animals evolve to become adapted to their environment C. Genetic drift results in evolution but not adaptation to the environment D. For natural selection to occur, differences in genetically-based traits must result in differential reproductive success E. All of the above are truearrow_forward
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