A. Porifera
B. Cnidaria
C. Platyheminthes
D. Nematoda

Correct Answer: Option A

A. Porifera

Explanation

Porifera are ‘pore bearing’ organisms, commonly known as sponges, are the only multicellular organisms without a nervous system. Their response to stimuli is by a contraction in their bodies.

Copyright warnings! Do not copy.

 

Earn Your Degree In 3 Years Without Writing UTME. Click Here To Learn More.