Which is not required for a behavioural trait to evolve by natural selection? An individual's reproductive success depends in part on how the behaviour is performed. a. b. The performance of the behaviour is partly determined by genes c. Some component of the behaviour is genetically inherited d. The behaviour varies among individuals е. An individual's genotype does not influence its behavioural phenotype

Which is not required for a behavioural trait to evolve by natural selection? An individual's reproductive success depends in part on how the behaviour is performed. a. b. The performance of the behaviour is partly determined by genes c. Some component of the behaviour is genetically inherited d. The behaviour varies among individuals е. An individual's genotype does not influence its behavioural phenotype

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter17: Processes Of Evolution

Section: Chapter Questions

Problem 4SA

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Sexual selection occurs whena. one sex has a higher fitness than the otherb. a species exhibits sexual dimorphismc. there is a male dominance hierarchy and only the alpha male reproduces. d. There is monogamous mating.e. A trait is favored by one sex such that individuals of the opposite sex possessing that trait have an increased likelihood of reproducing.
Clarify the difference between claiming that, a) some behaviours are genetically determined, versus b) some differences among individuals in behavioural phenotype are genetically determined. Are both claims valid in some circumstances? Use any suitable example you know about to justify your answer.
EVOLUTION CONNECTION We often explain our behaviorin terms of subjective feelings, motives, or reasons, butevolutionary explanations are based on reproductive fitness.Discuss the relationship between the two kinds of explanation.For instance, is an explanation for behavior such as “falling inlove” incompatible with an evolutionary explanation?
What is meant by “sexual selection”? a. Having an XX or XY chromosome pattern determines whether one develops as a female or a male. b. Hormones during a sensitive period produce longlasting effects on anatomy and behavior. c. Some people choose to switch from one gender identity to another. d. Evolution favors characteristics that make an individual more appealing to the opposite sex.
Phalaropes are shore birds with brightly colored females and dull colored males. Females are larger than males and compete with each other for access to males. Considering sexual selection theory, select the idea(s) below that seem(s) most plausible in light of the pattern of sexual dimorphism? Pick all that apply This is a picture of a brightly colored female: O Females incubate eggs and care for the young. Males incubate eggs and care for the young Males are choosy. males are not choosy
Which of the following is not required for a behavioral trait toevolve by natural selection?(A) In each individual, the form of the behavior is determinedentirely by genes.(B) The behavior varies among individuals.(C) An individual’s reproductive success depends in part onhow the behavior is performed.(D) Some component of the behavior is genetically inherited.
Which 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.
Would you expect sexual selection to increase or decrease adaptation of a population to its environment? A. Consider male-male competition first. B. Then consider the different mechanism for the evolution of female preferences and their implications for adaptation to the environment? Explain your thinking.
The northern red-legged frog, or Rana aurora, is found along the western coast from British Columbia to Northern California. Their typical breeding season lasts from January to March. The foothill yellow-legged frog, or Rana boylii, is found along the western coast from northern Oregon to central California. Their typical breeding season lasts from April to July. What mechanism might keep Rana aurora and Rana boylii from mating? anatomical isolation temporal isolation geographic isolation behavioral isolation
In Biology of Beauty, Cowley found that contemporaryfemales are attracted to males with broad foreheads and strong chins, and that this effect persisted across different cultures. How did Cowley explain this result? A. This is a trick question- this attraction is culturally relative B. Males compete for access to females by developing these features as a form of male-male competition C. There is no evidence that females really are differentially attracted to males with these features D. Attraction to males with these features is adaptive for females because males with these traits are usually sexually mature and have healthy immune systems E. Only some human cultures value these traits as attractive.
The theory that is based on four principles that describe how organisms who are well-adapted to their environment survive to produce offspring is called
D. The peak would become lower and more rounded. Natural selection changes the allele frequencies of the population which results in different observed phenotypes from the original population. Determine the pattern of Natural Selection observed in each scenario (questions 32-34). 23. Scenario 1: In Lobster populations, the large dominant alpha males obtain mates by brute force, while small males can sneak in for a copulation session with females when the alpha is distracted. As a result the medium sized lobster males do not have a chance to pass their genes to the next generation because they lack stealth and strength. Stabilizing Selection Disruptive Selection Directional Selection Normal Selection A. В. C. D. 24. Scenario 2: Women often have complications during labor while giving birth to very large babies, whereas very small babies tend to be underdeveloped. As a result, medium sized babies are the ones that end up surviving to adulthood. Stabilizing Selection Disruptive Selection…