Question

Which animal exhibits sexual dimorphism?
A. Unisexual
B. Bisexual
C. Sterile
D. Both A and B

Answer 1

Hint: Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs.

Complete step by step answer:
-The condition of sexual dimorphism occurs in many animals and some plants.
-Differences may include secondary sex characteristics, size, weight, colour, markings, and may also include behavioral and cognitive differences.
-These differences may be subtle or exaggerated, and may be subjected to sexual selection and natural selection.
-Unisexual organism or species are those animals that are capable of producing only male or female gametes (sex cells) but never both together in one animal at a time.
-The organisms in which both the male and female reproductive system are present in the same individual are called bisexual organisms or hermaphrodites.
-Sterile animals are those that are not capable of giving birth to young ones.

So, the answer is A. Unisexual

Note:
-Sexual dimorphism can be observed in Insects, Fishes, Amphibians, Aves and also Mammals.
-Monogamous mating system seems to account for minimal dimorphism in hylobatids, in which females are codominant with males.
-As an exception, among polygynous primates, colobines as a group consistently exhibit a low level of sexual size dimorphism.
-Sexual dimorphism is greater in uni-male societies than in multi-male societies.