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Metagenesis MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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  • Reproduction, Development and Metagenesis in Cnidaria is considered one of the most asked concept.

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Metagenesis refers to :

Concepts Covered - 1

Reproduction, Development and Metagenesis in Cnidaria
  • The reproduction occurs through both asexual and sexual means. 
  • Budding is the common method of asexual reproduction. 
  • Sexual reproduction occurs through the formation of gametes. 
  • Cnidarians exhibit metagenesis, i.e., alternation of generation. There are two body forms:
  • Polyp: It is fixed and sessile form with mouth and tentacles facing upwards (Cylindrical shaped). It reproduces asexually by budding to form the second body form.
  • Medusa: It is free-floating form with mouth and tentacles facing downwards (Umbrella shaped). It reproduces sexually to form polyps. 

EXAMPLES 

A) Only Polyp Forms : Hydra (fresh water polyp), Adamsia (Sea Anemone)

B) Only Medusa form : Aurelia (Jelly fish)

C) Metagesis : Obelia, Physalia (Portugese man of war)

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Reproduction, Development and Metagenesis in Cnidaria

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