Identify an organism that exhibits metagenesis.

Question

Question

This question was previously asked in

SSC CGL 2023 Tier-I Official Paper (Held On: 26 Jul 2023 Shift 3)

Answer 1

The correct answer is Obelia.Key Points

Metagenesis refers to a type of alternation of generations where the life cycle of an organism involves both sexual and asexual reproduction.
In this process, the offspring of the sexual phase undergo a phase of asexual reproduction before they mature into the sexual phase.
Obelia is a genus of colonial hydrozoans that exhibit metagenesis.
They have a complex life cycle that involves both polyp and medusa stages, and the polyps undergo asexual reproduction to produce medusae.

Additional Information

Spongilla is a genus of freshwater sponges that do not exhibit metagenesis.
- They reproduce sexually by releasing sperm and eggs into the water, which then develop into larvae that settle and grow into adult sponges.
Sycon is a genus of calcareous sponges that do not exhibit metagenesis.
- They reproduce sexually by releasing sperm and eggs into the water, which then develop into free-swimming larvae that settle and grow into adult sponges.
Euspongia is a genus of marine sponges that do not exhibit metagenesis.
- They reproduce sexually by releasing sperm and eggs into the water, which then develop into free-swimming larvae that settle and grow into adult sponges.