Question

‘Aquatic animals excrete ammonia’. Which one of the following statements does not support this statement?

• A. Ammonia is easily soluble in water
• B. Ammonia is released from the body in gaseous state
• C. Ammonia is highly toxic and needs to be eliminated when formed
• D. Ammonia gets converted into less toxic form called urea and uric acid

Answer 1

The correct option is B

Ammonia is released from the body in gaseous state

Explanation of the correct option:

The correct option is B:

1. The process by which the metabolic waste products that are harmful to the body are removed from the body is known as excretion.
2. The waste products are mostly in the nitrogenous form.
3. The aquatic animals are called ammonotelic as they excrete ammonia as their waste product.
4. Ammonia excreted by the aquatic animals is in the form of a solid-state not in the gaseous state.

Explanation of the incorrect options:

Option A:

1. Ammonia is released by aquatic animals as a waste product.
2. This is due to the easy solubility of ammonia in water.

Option C:

1. Ammonia formed in the body as a waste product is highly harmful to the internal organs and the body's pH.
2. Hence, it needs to be eliminated immediately when formed.

Option D:

1. After ammonia is excreted as a waste product, it is converted into urea or uric acid.
2. Urea and uric acid are less harmful than ammonia.

The statement that does not support the statement ‘Aquatic animals excrete ammonia’ is ‘Ammonia is released from the body in a gaseous state’.