Question

In sponges, there is

• A. The symmetry is radial
• B. Present a true coelom
• C. A single exist and a number of mouths
• D. A single mouth and a number of exist

Answer 1

Answer: (C)

A single exist and a number of mouths

The osculum is an excretory structure in the living sponge, a large opening to the outside through which the current of water exits after passing through the spongocoel. All sponges have ostia, which acts as mouth, channels leading to the interior through the mesohyl.

Therefore, the correct answer is option C.