First slide

Classification of Animals

Question

Following sequence of events occur in the life cycle of which of the following organisms?
Polyp $\to$ Medusa $\to$ Planula
A. Obelia
B. Physalia
C. Sea anemone

Easy

A

A only
B

A & B only
C

C only
D

A, B & C

Solution

Both, Obelia and Physalia show metagenesis. They show polyp stage, medusa stage. The larval stage of Obelia and Physalia are called as planula.
Sea anemone does not exhibit polymorphism.

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