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Question

The major excretory product of birds is

A
Urea.
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B
Uric acid.
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C
Nitrates.
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D
Ammonia.
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Solution

The correct option is D Uric acid.
In animals, the main excretory products are carbon dioxide, ammonia (in ammonotelics), urea (in ureotelics) and uric acid (in uricotelics). Mammals such as humans are ureotelics and excrete urea. Birds, reptiles are uricotelics and the major excretory product is uric acid. Aquatic animals are ammonotelics and excrete ammonia.
Thus, the correct answer is option B.

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