12. In the metagenesis of
Aurelia and Obelia what is the
form that produces gametes?
What is the form that
reproduces asexually?

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In the metagenesis some
coelenterates, like and Obelia,
there alternation between polypoid
medusoid forms. The
reproduce asexually originating
that then liberate .
The male and gametes unite
under to form the that
then develops larva and later
another polyp.

The that reproduces asexually
the polyp. Polyps birth to medusae
budding in Obelia by
strobilization in .