BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 20, Problem 8U
Summary Introduction
The highly elongated and elaborative tails of peacocks are called the train covered with feathers. The features are marked by the eyespots, which are the center of attraction of all the spectators, as well as the peahens. Also, the peacocks that have the enlarged feathers are referred to be as the dominant, whereas the peacocks, with fewer feathers, are said to be the recessive organisms.
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Chapter 20 Solutions
BIOLOGY
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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- Evolutionary change caused by natural selection results in species witha. greater complexity.b. less complexity.c. greater reproductive success in their native environment.d. the ability to survive longer.arrow_forward#4: In clown fish (chose one answer) A. Individuals are protandrous.B. It is better to be male when you are small and a female when you are big.C. Everyone begins life as a male.D. All of the abovearrow_forwardWhich of these situations offers the lowest “opportunity for selection” for males? A. Females choose mates with a fancy ornament. B. Every female chooses one male to mate with for life. C. Locations that females need access to in order to reproduce are rare. D. Males fight each other for access to groups of females.arrow_forward
- Which of the following statements is a reason why females are usually the "choosier" sex? A. They expend fewer resources in caring for their offspring. B. They have higher potential fitness than males. C. They have fewer opportunities to contribute offspring than males. D. They directly compete with each other for mates.arrow_forwardIn the paper by John Endler about colored spots in guppies, Endler finds that Select one: a.female guppies become more colorful in the presence of predators. b.female guppies become less colorful in the presence of predators. c.male guppies become less colorful in the presence of predators. d.male guppies become more colorful in the presence of predators. e.No change in color occurs in both male and female guppies, providing an example of a population at Hardy-Weinberg equilibrium.arrow_forwardQuestion:- The feathered head crest of a male Gambel’s quail: a. is used to signal passive or aggressive interactions. b. can be used to deceive predators. c. may be used for communication because it is a preexisting trait. d. both a and c.arrow_forward
- In most mammal species, a male is _____ to provide parental carebecause his confidence of paternity is _____.a. likely; highb. unlikely; highc. likely; lowd. unlikely; lowarrow_forwardMonkeys and apes share one trait with birds that is unusual among other mammals. It is … Group of answer choices: A.nest-building behavior. B.no fear of heights. C.a tendency for pair-bonding. D.the use of vocalization to attract mates. E. well-developed color vision.arrow_forwardThis hypothesis suggests that a resulting association of female preference and male display trait can lead to a positive feedback cycle of ever stronger preference and greater display trait. A. Fisher-Zahavi process. B. Fisher's runaway model. C.Good genes process. D.Bateman's principle.arrow_forward
- Courtship rituals are thought to have come about througha. intrasexual selection.b. agonistic behavior.c. intersexual selection.d. kin selection.arrow_forwardHow was stress helpful for us in our evolutionary past? A. None of these are correct. B. It helped us to be independent and live alone. C. It gave us fight or flight instincts and helped us avoid danger. D. Stress is never useful and it only harmed our early ancestors.arrow_forward. In white-crowned sparrows, social experience exhibits a very stronginfluence over the development of singing patterns. What observation led to this conclusion?a. Birds learned to sing only when they were trained by other birds.b. The window in which birds learn from other birds is wider thanthat in which birds learn from tape recordings.c. Birds could learn different dialects only from other birds.d. Birds that learned to sing from a tape recorder could change theirsong when they listened to another bird.arrow_forward
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