Question 1

Which is NOT a characteristic of a eusocial species?

Accepted Answer

A eusocial species typically has reproductive dominance by a few individuals, not many.

Question 2

The term henpecked in chickens refers to chickens pecking at injured spots on other chickens, exacerbating the original injury. How did researchers overcome the problem of henpecked chickens?

Accepted Answer

The answer of The term henpecked in chickens refers to...

Question 3

Which does NOT have a haplodiploid mating system?

Accepted Answer

Ants, bees, and wasps all have a haplodiploid mating system where females develop from fertilized eggs and males are produced from unfertilized eggs. Termites, on the other hand, have a typical diploid mating system where both males and females develop from fertilized eggs.

Question 4

Why would an individual in a social group of a diploid species help to rear the young of its siblings rather than reproducing itself? Describe the expected relative importance of direct and indirect fitness benefits and explain your answer.

Accepted Answer

The answer of Why would an individual in a social...

Question 5

How many castes do bees have?

Accepted Answer

Bees have three castes: queen, worker, and drone. The queen is responsible for laying eggs, the workers are responsible for gathering nectar and pollen and taking care of the hive, and the drones are responsible for mating with the queen.

Question 6

In haplodiploid mating systems, nonqueen females are

Accepted Answer

In haplodiploid systems, nonqueen females are typically diploid and infertile workers, as seen in species like bees and ants.

Question 7

What evidence do we have that eusociality appeared to evolve independently, many times?

Accepted Answer

The answer of What evidence do we have that eusociality...

Question 8

In haplodiploid mating systems, males are

Accepted Answer

In haplodiploid mating systems, males develop from unfertilized eggs and are haploid. They are also fertile and can mate with females to produce offspring. Therefore, option A is correct.

Question 9

What prevents nondominant mole rats from reproducing?

Accepted Answer

Harassment by the dominant members prevents nondominant mole rats from breeding. Dominant members of a mole rat colony actively suppress the sexual development of nondominant members through physical aggression and chemical cues, thus preventing them from reproducing.

Question 10

In termite colonies, which of the following does NOT reproduce?

Accepted Answer

Drones, queens, and kings are all reproductive members of the termite colony. Soldiers, on the other hand, are sterile and do not reproduce.

Question 11

The worker caste in bees consists entirely of

Accepted Answer

The worker caste in bees consists of females that are in an arrested stage of development, which prevents them from becoming fully reproductive.

Question 12

The sex determination system in hymenopterans such as ants, bees, and wasps is

Accepted Answer

Hymenopterans have a haplodiploid sex determination system. Females are diploid and develop from fertilized eggs, while males are haploid and develop from unfertilized eggs. This is because males develop from eggs that only contain one set of chromosomes (haploid), which are produced by a process called arrhenotoky. Females develop from eggs that contain two sets of chromosomes (diploid), which are produced by a process called thelytoky.

Question 13

Which group does NOT contain a eusocial species?

Accepted Answer

Eusociality is characterized by cooperative brood care, overlapping generations within a colony of adults, and a division of labor into reproductive and non-reproductive groups. Corals do not exhibit these characteristics of eusociality; they are colonial but not eusocial. Termites, ants, and some mammals (like naked mole-rats) do show eusocial behavior.

Question 14

In general terms, what type of habitat would one likely see territoriality and in what type of habitat would one not expect to see territoriality?

Accepted Answer

The answer of In general terms, what type of habitat...

Question 15

If the direct fitness cost to a donor is 6 and the indirect fitness benefit to the recipient is 30, is altruistic behavior likely to evolve between cousins? Is the altruistic behavior likely to evolve between full siblings?

Accepted Answer

The answer of If the direct fitness cost to a...

Question 16

The two social interactions called altruism and selfishness both have one individual in the interaction obtaining a positive fitness effect and one individual in the interaction obtaining a negative fitness effect. However, these two interactions are not the same. How are these two interactions different?

Accepted Answer

The answer of The two social interactions called altruism and...

Question 17

In haplodiploid societies, which would be expected to show most cooperation?

Accepted Answer

Females in haplodiploid societies are more closely related to their sisters than they are to their own offspring, due to the fact that they share the same father but have different mothers. This creates a strong incentive for females to cooperate with their sisters in order to ensure the survival and reproduction of their shared genes. In contrast, males only pass on their genes to their own offspring, so they are expected to show less cooperation with other males. Therefore, an all-female group would be expected to show the most cooperation in haplodiploid societies.

Question 18

In haplodiploid societies, a _____ produces male gametes by _____.

Accepted Answer

In haplodiploid societies, males are haploid and produce male gametes (sperm) by mitosis, as they do not undergo meiosis due to having only one set of chromosomes.

Question 19

Which of the following is NOT an ecosystem process associated with eusocial insects?

Accepted Answer

Decomposition is not an ecosystem process associated with eusocial insects.

Question 20

In some eusocial, haplodiploid species, the coefficient of relatedness is said to display strong asymmetries. What does this mean?

Accepted Answer

The answer of In some eusocial, haplodiploid species, the coefficient...

Quiz 10: Social Behaviors