A) mouth and mouth
B) body wall and body wall
C) mouth and body wall
D) mouth and tentacles
Correct Answer: C
Solution :
| [c] In Hydra undigested residues are egested from coelentron through mouth while nitrogenous excretory product (ammonia) is removed through general body surface. |
| Hydra are solitary sessile fresh water Coelentrates. They are found in lakes ponds stream. Hydra is an ammonotelic animal i.e. it excretes waste material in the form of ammonia. |
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