Question

10. Water vascular system is IUUIU III
(a) Hydra
(b) Earthworm
(c) Star fish (d) Ascaris
II. Fill in the blanks.
1. The skeletal framework of Porifera is
2. Ctenidia are respiratory organs ir
3
Skates are
fiches​

Answer 1

Explanation:

Water vascular system (ambulacral system) is typically found in B) Sponge