Metagenesis and Polymorphism | Phylum Cnidaria

The relationship between metagenesis and polymorphism has raised the question—is metagenesis an outcome of polymorphism or has it lead to the emergence of polymor­phism? A discussion on the existence of different grades of metagenesis in cnidarians will help us to find a logical answer. Gradations of Metagenesis: Four differ­ent forms of life-histories are seen in the cnidarians which exhibit a [...]