Question

Self-fertilization in earthworm is prevented due to

• A. protogyny
• B. protandry
• C. Reproductive structures not conducive for self-fertilization
• D. both b and c

Answer 1

The correct option is D

both b and c

But cross-fertilization occurs as a rule because of the relative position of male and female genital apertures and also because earthworms are protandrous, the male gametes mature earlier than the female gametes, so that self-fertilization is prevented.