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Question

Which of the following glands plays a key role in the metamorphosis of frog's tadpole?

A
Adrenal
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B
Thymus
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C
Pancreas
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D
Thyroid
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Solution

The correct option is D Thyroid
Seasonal changes such as fur molting in mammals or skin shedding by reptiles are directed by thyroid hormones. The hormones start hair growth in rodents, sheep, and other mammals. They also initiate amphibian metamorphosis, that transforms tadpoles into frogs.

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