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

In the metagenesis of some coelenterates, like Obelia and Aurelia, there is alternation between medusoid and polypoid forms. The polyps reproduce asexually originating medusae that then liberate gametes. The female and male gametes unite under water to form the zygote that then develops into larva and later originates another polyp.

The form that reproduces asexually is the polyp. Polyps give birth to medusae by budding in Obelia and by strobilization in Aurelia.