Question

The formation of canal system in sponges is due (1)Folding of inner walls (2)Gastro-vascular system (3)Reproduction (4)Modification of coelom

Answer 1

Answer:

reproduction in the process in which male and female generate their own and for thier

Answer 2

Answer:

The answer is 1) Folding of inner walls

Explanation:

Thick body wall of folded forming regularly arranged in pushings and out pushings leading to the formation of canals .....

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