First slide

Classification of Animals

Question

Which one of the following is incorrect about sponges?

Easy

A

All are aquatic.
B

They are primitive multicellular animals.
C

Most of them are asymmetrical.
D

Digestion is extracellular.

Solution

Sponges are suspension feeders (filter feeders). Digestion is intracellular, and takes place in choanocytes and archaeocytes.

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