Question

Which of the following statements about Spongilla, leech, dolphin and penguin is correct?

• A. Penguin is homeothermic while the remaining three are poikilothermic.
• B. Leech is found in fresh water form while all others are marine.
• C. Spongilla has special collar cells called choanocytes, not found in the remaining three.
• D. All are bilaterally symmetrical.

Answer 1

The correct option is C Spongilla has special collar cells called choanocytes, not found in the remaining three.

Spongilla has special collar cells called choanocytes, not found in the remaining three.