For the metamorphosis of tadpoles which of the following elements must be available in water? (a) chlorine (b) carbon (c) sulphur iodine

A.VERIFIED ANSWERfact-checked by tutors

Soln:

Answer is (d) iodine

Explanation:

Metamorphosis is brought by a hormone called as thyroxine. Thyroid gland needs Iodine to secrete Thyroxine. Hence Iodine should be present in water for the metamorphosis of tadpoles.

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