The main nitrogenous waste of Hydra is
Options
(a) Ammonia only
(b) Urea only
(c) Uric acid only
(d) Both (a)Ammonia only and (c)Uric acid only
Correct Answer:
Ammonia only
Explanation:
The main nitrogenous waste of Hydra is ammonia. Hydra has no organ of excretion, therefore, excretion of waste nitrogenous matter occurs directly by diffusion through all membrane.