Multiple choice

Which of the following is not a characteristic feature of sponges?

  1. Diploblastic body

  2. Presence of collar cells

  3. Aerobic respiration

  4. Flame cells as excretory organs

  5. Lack of circulatory system

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In sponges, excretion takes place through general body cavity. They are ammonotelic in nature.