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Gonads of Obelia occur...

Gonads of Obelia occur

A

In hydrula stage and indefinite in number

B

Bases of tentacles of medusa and 8 in number

C

On blastostyles and 8 in number

D

On radial canals, oral surface of medusa and four in number

Text Solution

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The correct Answer is:
D
(d) A sexually mature medusa of obelia bears four groups of gonads situated on the middle of four radial canal.
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Assertion Medusa of Obelia is carnivorous . Reason Digestion is both extracellular and intracellular.

During the metagenesis of Obelia ,

Blastostyle of Obelia bears

Medusa of Obelia differs from Aurelia in having

Assertion : Obelia is dimorphic in nature Reason : Obelia shows polyp and gonangia form