Adult sperm are capable of producing sperm and what in order to be able to reproduce?
Options:
- (A) Plants growth
- (B) reproduce
- (C) skin cells
- (D) female gametes
- (E) it needs them
- (F) kinetic energy
- (G) estrogen
- (H) vaginas Let's solve this problem gradually.

user
Adult sponges produce eggs and sperm. Female gametes are called eggs. Adult sponges produce female gametes and sperm. So the final answer is (D).
assistant