Q.

Metagenesis refers to

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a

presence of a segmented body and parthenogenetic mode of reproduction

b

presence of different morphic forms

c

alternation of generation between asexual and sexual phases of an organism

d

occurrence of a drastic change in form during postembryonic development

answer is D.

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Detailed Solution

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Metagenesis refers to the alternation of asexual polypoid and sexual medusoid generations in cnidarians.
(1) Occurrence of a drastic change in form during post-embryonic development is termed metamorphosis.
(2) Presence of segmented body is metamerism.
(3) Presence of different morphic forms is termed polymorphism.

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