Question

The cells absent in sponges are

• A. Reserve cells
• B. Nerve cells
• C. Germ cells
• D. Gland cells

Answer 1

Answer: (B)

Nerve cells

A. Reserve cells are the cells that are associated with the storage of food.

B. Nerve cells are the neurons that are involved in transmitting impulse across the brain.

C. Germ cells are the embryonic cells that develop into gametes.

D. Gland cells secrete an adhesive substance and provide a means of attachment for the animal.

Porifera is the only phylum without nerve cells in the animal kingdom.

So, the correct answer is 'Nerve cells'.