BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 12, Problem 5MCQ
Suppose that after an environmental change, foxes with shorter legs than average are most likely to survive and reproduce. What type of selection will act on this population in the coming generations?
| a. | Directional selection |
| b. | Stabilizing selection |
| c. | Disruptive selection |
| d. | Normalizing selection |
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Which type of selection results in greater genetic variance in a population? a. stabilizing selection b. directional selection c. diversifying selection d. positive frequency-dependent selection
Chapter 12 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 12.1 - What are two ways to define evolution?Ch. 12.1 - Prob. 2MCCh. 12.2 - Prob. 1MCCh. 12.2 - What did Darwin observe that led him to develop...Ch. 12.2 - What is modern evolutionary synthesis?Ch. 12.3 - Prob. 1MCCh. 12.3 - Prob. 2MCCh. 12.3 - Prob. 3MCCh. 12.3 - Prob. 4MCCh. 12.4 - Prob. 1MC
Ch. 12.4 - Why doesnt Hardy-Weinberg equilibrium occur in...Ch. 12.5 - Distinguish among directional, disruptive, and...Ch. 12.5 - How can natural selection maintain harmful alleles...Ch. 12.6 - Prob. 1MCCh. 12.6 - Prob. 2MCCh. 12.7 - How do mutations affect an organisms phenotype?Ch. 12.7 - South china tigers once had two color patterns...Ch. 12.7 - Prob. 3MCCh. 12.7 - Prob. 4MCCh. 12 - Microevolution applies to changes that occur a....Ch. 12 - Biological evolution describes how ____ change...Ch. 12 - Prob. 3MCQCh. 12 - What is the most accurate way to explain the...Ch. 12 - Suppose that after an environmental change, foxes...Ch. 12 - Huntington disease is caused by a rare, lethal,...Ch. 12 - A population of 100 sea stars is in Hardy-Weinberg...Ch. 12 - Prob. 8MCQCh. 12 - Darwin observed that different types of organisms...Ch. 12 - Which of the following processes is nonrandom? a....Ch. 12 - Prob. 1WIOCh. 12 - Prob. 2WIOCh. 12 - Explain how understanding evolution is important...Ch. 12 - Write a paragraph that describes the connections...Ch. 12 - Jellyfish Lake, located on the Pacific island of...Ch. 12 - Prob. 6WIOCh. 12 - Explain how harmful recessive alleles can persist...Ch. 12 - Prob. 8WIOCh. 12 - Describe the competing selective forces acting on...Ch. 12 - Some researchers suggest that a giraffes long neck...Ch. 12 - Burning Question 12.1 explains why an organism...Ch. 12 - Review the Survey the Landscape figure in the...Ch. 12 - Describe situations in which the five mechanisms...Ch. 12 - Prob. 3PIT
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- In general, what is the effect of complete selection, migration and random genetic drift on the gene frequencies of the population? a. complete selection b. migration c. random genetic driftarrow_forwardMatch each term with the best description. 1. natural selection 2. domesticated 3. intentional breeding 4. artificial selection a. when the environment is the controlling agent b. when humans purposefully select a male and female for mating or breeding c. tamed or made appropriate for use by humans d. when humans act as the controlling agentarrow_forwardAlleles that increase resistance to disease are expected to increase in frequency in the population as a result of? a. positive selection b. negative selection c. balancing selection d. artificial selectionarrow_forward
- Which of these is the least acceptable explanation for how an altruistic gene might spread in a population? a. Selection for a gene that benefits the individuals’ relatives b. Selection for helping individuals who might return the favor c. Selection for genes that benefit the species d. Selection for groups that are more cooperative than other groupsarrow_forwardIndividuals in a population of sunflowers have a range of flower sizes, and the average diameter of their flowers is 5 cm. What effect would selection have on flower diameter in this population of sunflowers? A. The average flower diameter may not change if the population is under disruptive selection. B. Small flowers are favoured if the population is under disruptive selection. C. The average flower diameter will increase if the population is under stabilizing selection. D. Large flowers are favoured if the allele for flower size is dominant when the population is under directional selection.arrow_forwardWhen male lions reach sexual maturity, they leave their group in search of a new pride. This can alter the allele frequencies of the population through which of the following mechanisms? a. natural selection b. genetic drift c. gene flow d. random matingarrow_forward
- Which of the four evolutionary mechanisms make a population better adapted to its environment? A. Migration B. Genetic drift C. Mutations D. Natural selection. arrow_forwardWhat is the difference between artificial selection (e.g., greyhounds that are bred for speed) and natural selection? a. In artificial selection, the genetic variation introduced into the population is limited, but in natural selection, it is not b. In artificial selection, the environment is the selective force, while in natural selection, humans are the selective force c. In natural selection, the environment is the selective force, while in artificial selection, humans are the selective force d. Unlike other species, dogs are not subject to natural selection e. Both A & Carrow_forwardThe main idea behind Darwin’s theory of natural selection was Group of answer choices a. Competition for space between the individuals will limit a population b. Individuals pass on acquired characteristics to their offspring c. Individuals with advantageous adaptations are more likely to out-produce those lacking that adaptation d. Populations adapt over timearrow_forward
- What is the greatest source of genetic variation in plant and animal populations? a. Geographic variation b. Recessive masking in heterozygotes c. Selection d. Sexual reproductionarrow_forwardD. II and IV PDF Final Exam JPG Converted.pdf Sign in 28. The sperm count of the human population of developed societies has million per ml to 50 million per ml in recent years. This is an example of A. directional selection B. disruptive selection C. sexual selection D. stabilising selection 29. Which of the followings is TRUE about directional selection? A. Selection pressure against organisms with one of the extreme phenotypes. B. It usually occurs in response to a stable environment. C. The mean value of the population graph remains unchanged. D. Example for direction selection is the birth weights of human babies. Page 10 of 23 Cell Biology BIO30305 Dr. Ng Woei Kean 202104 FE 30. Which type of selection causes the dark-coloured moth has a natural selective advantage over the light-coloured moth during industrial melanism in the 19th century? A. Stabilising selection B. Directional selection C. Sexual selection D. Disruptive selection Page 11 / 23arrow_forwardWhich statement best summarizes why genetic drift tends to impact small populations more than large populations? A. Small populations have a heterozygote advantage because heterozygotes are more common than homozygotes. B. Small populations have a smaller gene pool, so random changes influence them more. C. Small populations have a relatively large gene pool, so the founder effect stabilizes their alleles.D. Small populations tend to experience directional selection, making one phenotype more common.arrow_forward
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