What is the term for the fusion of two motile gametes which are dissimilar in size?
(a) Anisogamy
(b) Isogamy
(c) Oogamy
(d) Zoogamy
Ans. The answer is the option (a) Anisogamy.
Explanation: Anisogamy refers to the fusion of two gametes that differ in size. In contrast, isogamy involves the fusion of gametes that are similar in size. Oogamy is a specific type of gametic fusion that occurs between a large, non-motile gamete and a small, motile gamete. All of these processes are types of syngamy, which is the general term for fertilization. Additionally, zoogamy specifically pertains to the sexual reproduction of animals.