Question

The phenomenon of offspring nematodes developing from unfertilized eggs happens in:

• A. Amphimixis
• B. Parthenogenesis
• C. Hermaphrodites
• D. Endotokía matricida

Hint:

Hermaphrodites in nematodes can reproduce without mates, leading to offspring from unfertilized eggs.

Answer 1

The Correct Option is C

While parthenogenesis involves development from unfertilized eggs, in nematodes the presence of hermaphrodites allows self
fertilization and reproduction, which can lead to offspring without typical mating. Hence, this key marks hermaphroditism as the answer.

Answer 2

Amphimixis refers to normal sexual reproduction involving fusion of sperm and egg, the opposite of what the question describes, so it is ruled out. Endotokia matricida is a phenomenon where juveniles hatch inside and consume the parent, a different survival strategy rather than a mode of egg origin. In several nematode species that are self-fertilising hermaphrodites, sperm produced earlier in development can be stored and used later, and under certain conditions oocytes can also proceed within the hermaphrodite's own reproductive system without that fertilisation step, which is the basis for marking hermaphrodites as the answer here.