Which describes quasisociality?

• A. A colony with multiple egg-laying queens.
• B. An organism that lives commensally within the nest of another organism.
• C. A colony with overlapping generations but no brood care.
• D. Members of the same generation use the same nest and cooperate in rearing young.

Answer: (D)

The main idea here is cooperative brood care without a specialized worker caste. Quasisociality describes a group where adults share a nest and work together to rear the young, but there isn’t a clear division into reproductive and nonreproductive castes. The statement that members of the same generation use the same nest and cooperate in rearing young captures that pattern: there is cooperative care and nest sharing among individuals, yet no explicit sterile worker roles.

The other scenarios describe different social setups. A colony with multiple egg-laying queens hints at multiple breeders, which isn’t the defining feature of quasisociality and can occur in other social forms. Living commensally within another species’ nest is not a social system among members of the same group. A colony with overlapping generations but no brood care lacks the essential brood-care component that defines this social form.