First slide

Classification of Animals

Question

Read the following statements and choose the correct option.
A) In Obelia, polyps produce medusae asexually and medusae form the polyps sexually.
B) Polyp is a sessile and cylindrical form whereas medusa is umbrella shaped and a free swimming form.

Easy

A

Both A and B are correct
B

Both A and B are incorrect
C

Only A is correct
D

Only B is correct

Solution

Cnidarians like Obelia exhibit two basic body forms called polyp and medusa. The polyp is a sessile and cylindrical form whereas, the medusa is umbrella-shaped and free-swimming. Those cnidarians which exist in both forms exhibit alternation of generation (Metagenesis), i.e., polyps produce medusae asexually and medusae form the polyps sexually.

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