Question

In Hydra and Amoeba, ammonia is the main nitrogenous waste. Lizards, snakes, birds and insects excrete mostly uric acid but crocodiles and alligators excrete mainly ammonia though they are reptiles.
On the basis of this can we generalise that :-

• A. There is no uniform pattern of removal of nitrogen wastes.
• B. Aquatic and land animals excrete urea.
• C. Animals that fly excrete uric acid.
• D. Nitrogen waste excretion is closely related to the availability of water in the environment.

Answer 1

The correct option is D

Nitrogen waste excretion is closely related to the availability of water in the environment.

In Hydra and Amoeba, ammonia is the main nitrogenous waste. Lizards, snakes, birds and insects excrete mostly uric acid but crocodiles and alligators excrete mainly ammonia though they are reptiles. Hence, we can generalize that nitrogeneous waste excretion is closely related to the availability of water in the environment.