Question

In star fish, the upper side contains

• A. Mouth
• B. Mouth and ambulacral grooves
• C. Anus
• D. Anus and madreporite

Answer 1

Answer: (D)

Anus and madreporite

A) The mouth is located on the ventral/ lower surface.

B) Mouth and ambulacral grooves are present on the ventral/ lower surface.

C) Anus is present on the upper/ aboral surface.

D) The anus and madreporite are present on the aboral/ upper surface.

So the correct answer is 'Anus and madreporite'