Question

Which of the following cell is absent in sponges?

• A. Nerve cell
• B. Gland cell
• C. Sensory cell
• D. All of the above

Answer 1

The correct option is A Nerve cell

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

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

C. Sensory cells are the specialised cells that detect information such as touch, sound, smell, taste, temperature.

Phylum porifera is the only phylum in animal kingdom in which nerve cells are absent. Hence, sponges do not have nerve cells.

So, the correct answer is 'Nerve cell'.