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Metagenesis refers to
Option: 1
Alternation of generation between asexual and sexual phases of an organism
Option: 2
Occurrence of a drastic change in form during post - embryonic development
Option: 3
Presence of a segmented body and parthenogenetic mode of reproduction
Option: 4
Presence of different morphic forms
Answers (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. It reproduces asexually by budding to form the second body form.
- Medusa: It is free-floating form with mouth and tentacles facing downwards. It reproduces sexually to form polyps.
The occurrence, during the life cycle of an organism, of two types of individual, both diploid, both of which reproduce, one sexually and asexually is called metagenesis.
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