Metagenesis referes to

Options

A. Alternation of generation between asexual and sexual phases of an organisms
B. Occurrence of a drastic change in form during post embryonic development
C. Presence of a segmented body and parthenogenetic mode of reproduction
D. Presence of different morphic forms

Answer

A

Explanation

In some organism of cnidaria have polyp form (sessile undergo asexual reproduction) and some have medusae (free swimming undergo sexual reproduction). In some organism it shows both sexual and asexual means metagenesis.