Showing posts with label Biology Chapter 51. Show all posts
Showing posts with label Biology Chapter 51. Show all posts

The core idea of sociobiology is that

The core idea of sociobiology is that



A) human behavior is rigidly determined by inheritance.

B) humans cannot choose to change their social behavior.

C) much human behavior has evolved by natural selection.

D) the social behavior of humans has many similarities to that of social insects such as honeybees.

E) the environment plays a larger role than genes in shaping human behavior.



Answer: C

Female spotted sandpipers aggressively court males and, after mating, leave the clutch of young for the male to incubate. This sequence may be repeated several times with different males until no available males remain, forcing the female to incubate her last clutch. Which of the following terms best describes this behavior?

Female spotted sandpipers aggressively court males and, after mating, leave the clutch of young for the male to incubate. This sequence may be repeated several times with different males until no available males remain, forcing the female to incubate her last clutch. Which of the following terms best describes this behavior?



A) monogamy

B) polygyny

C) polyandry

D) promiscuity

E) certainty of paternity



Answer: C

According to Hamilton's rule, of the altruist.

According to Hamilton's rule, of the altruist.



A) natural selection does not favor altruistic behavior that causes the death of the altruist.

B) natural selection favors altruistic acts when the resulting benefit to the beneficiary, correct for relatedness, exceeds the cost to the altruist.

C) natural selection is more likely to favor altruistic behavior that benefits an offspring than altruistic behavior that benefits a sibling.

D) the effects of kin selection are larger than the effects of direct natural selection on individuals.

E) altruism is always reciprocal.



Answer: B

Researchers have found that a region of the canary forebrain shrinks during the nonbreeding season and enlarges when breeding season begins. This annual enlargement of brain tissue is probably associated with the annual

Researchers have found that a region of the canary forebrain shrinks during the nonbreeding season and enlarges when breeding season begins. This annual enlargement of brain tissue is probably associated with the annual



A) addition of new syllables to a canary's song repertoire.

B) crystallization of subsong into adult songs.

C) sensitive period in which canary parents imprint on new offspring.

D) renewal of mating and nest-building behaviors.

E) elimination of the memorized template for songs sung the previous year.



Answer: A

Although many chimpanzee populations live in environments containing oil palm nuts, members of only a few populations use stones to crack open the nuts. The most likely explanation for this behavioral difference between populations is that

Although many chimpanzee populations live in environments containing oil palm nuts, members of only a few populations use stones to crack open the nuts. The most likely explanation for this behavioral difference between populations is that



A) the behavioral difference is caused by genetic differences between populations.

B) members of different populations have different nutritional requirements.

C) the cultural tradition of using stones to crack nuts has arisen in only some populations.

D) members of different populations differ in learning ability.

E) members of different populations differ in manual dexterity.



Answer: C

Which of the following is not required for a behavioral trait to evolve by natural selection?

Which of the following is not required for a behavioral trait to evolve by natural selection?


A) In each individual, the form of the behavior is determined entirely by genes.

B) The behavior varies among individuals.

C) An individual's reproductive success depends in part on how the behavior is performed.

D) Some component of the behavior is genetically inherited.

E) An individual's genotype influences its behavioral phenotype.



Answer: A

Which of the following is true of innate behaviors?

Which of the following is true of innate behaviors?



A) Genes have very little influence on the expression of innate behaviors.

B) Innate behaviors tend to vary considerably among members of a population.

C) Innate behaviors are limited to invertebrate animals.

D) Innate behaviors are expressed in most individuals in a population across a wide range of environmental conditions.

E) Innate behaviors occur in invertebrates and some vertebrates but not in mammals.



Answer: D

Animals that help other animals of the same species are expected to

Animals that help other animals of the same species are expected to



A) have excess energy reserves.

B) be bigger and stronger than the other animals.

C) be genetically related to the other animals.

D) be male.

E) have defective genes controlling their behavior.



Answer: C

The presence of altruistic behavior is most likely due to kin selection, a theory maintaining

The presence of altruistic behavior is most likely due to kin selection, a theory maintaining



A) aggression between sexes promotes the survival of the fittest individuals.

B) genes enhance survival of copies of themselves by directing organisms to assist others who share those genes.

C) companionship is advantageous to animals because in the future they can help each other.

D) critical thinking abilities are normal traits for animals and they have arisen, like other traits, through natural selection.

E) natural selection has generally favored the evolution of exaggerated aggressive and submissive behaviors to resolve conflict without grave harm to participants.



Answer: B

In Belding's ground squirrels, it is mostly the females that behave altruistically by sounding alarm calls. What is the likely reason for this distinction?

In Belding's ground squirrels, it is mostly the females that behave altruistically by sounding alarm calls. What is the likely reason for this distinction?



A) Males have smaller vocal cords and are less likely to make sounds.

B) Females invest more in foraging and food stores, so they are more defensive.

C) Females settle in the area in which they were born, so the calling females are warning kin.

D) The sex ratio is biased.

E) Males forage alone; therefore, alarm calls are useless.



Answer: C

The central concept of sociobiology is that

The central concept of sociobiology is that



A) human behavior is rigidly predetermined.

B) the behavior of an individual cannot be modified.

C) our behavior consists mainly of fixed action patterns.

D) most aspects of our social behavior have an evolutionary basis.

E) the social behavior of humans is homologous to the social behavior of honeybees.



Answer: D

Fred and Joe, two unrelated, mature male gorillas, encounter one another. Fred is courting a female. Fred grunts as Joe comes near. As Joe continues to advance, Fred begins drumming (pounding his chest) and bares his teeth. Joe then rolls on the ground on his back, gets up, and quickly leaves. This behavioral pattern is repeated several times during the mating season. Choose the most specific behavior described by this example.

Fred and Joe, two unrelated, mature male gorillas, encounter one another. Fred is courting a female. Fred grunts as Joe comes near. As Joe continues to advance, Fred begins drumming (pounding his chest) and bares his teeth. Joe then rolls on the ground on his back, gets up, and quickly leaves. This behavioral pattern is repeated several times during the mating season. Choose the most specific behavior described by this example.


A) agonistic behavior

B) territorial behavior

C) learned behavior

D) social behavior

E) fixed action pattern



Answer: A