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Question

Which gland plays a key role in metamorphosis of a frog?

A
Adrenal
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B
Thyroid
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C
Pituitary
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D
Pancreas
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Solution

The correct option is C Thyroid
  • Metamorphosis is a profound change of form during development from larva to adult animals.
  • The process of metamorphosis is essentially under hormonal control. Hormones from the hypothalamus (e.g. TSH or thyroid-stimulating hormone) and the thyroid gland regulate the process of metamorphosis.
  • Thyroxine hormone secreted by the thyroid gland affects the tissues directly, causing the degeneration and necrosis of some cells and stimulating the growth and differentiation of others.
  • Thus, thyroid glands play a key role in the metamorphosis of a frog.
Therefore, the correct answer is option B.

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