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Q: Identify an organism that exhibits metagenesis.
  • A. Euspongia
  • B. Spongilla
  • C. Sycon
  • D. Obelia
Correct Answer: Option D - Metagenesis refers to the alternation of generations where an organism has both asexual and sexual phases in its life cyle. Obelia, a genus of colonial hydrozoans, is known to exhibit this phenomenon, where the polyp form alternates with the medusa form. Polyp stage is asexual and medusa stage is sexual.
D. Metagenesis refers to the alternation of generations where an organism has both asexual and sexual phases in its life cyle. Obelia, a genus of colonial hydrozoans, is known to exhibit this phenomenon, where the polyp form alternates with the medusa form. Polyp stage is asexual and medusa stage is sexual.

Explanations:

Metagenesis refers to the alternation of generations where an organism has both asexual and sexual phases in its life cyle. Obelia, a genus of colonial hydrozoans, is known to exhibit this phenomenon, where the polyp form alternates with the medusa form. Polyp stage is asexual and medusa stage is sexual.