Tadpoles present in iodine deficient water cannot become adults. Why?

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Solution

Iodine is an essential element of thyroid hormone. The thyroid hormone with its essential iodine constituent is responsible for the control of metabolism and also for metamorphosis. If Iodine is not present in the diet ,the thyroid may produce an inefficient amount of hormone which will adversely affect the metamorphosis . So the tadpoles will not be able to become adult frogs.

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Similar questions

Q. Why do tadpoles growing in iodine deficient waters fail to grow into frogs?

It was observed that the tadpoles are not growing into adult frogs in a village pond. A scientist who was asked to find the reason for this concluded that the pond water did not contain a sufficient amount of a mineral P which could make a hormone Q. The hormone Q can cause a phenomenon R in tadpoles so that they become adult frogs.

(a) What are (i) P (ii) Q, and (iii) R?

(b) Name one human disease which can also be caused due to the deficiency of P in the food and water.

Q. Deficiency of iodine in adults causes .

What will happen if the water in which tadpoles are growing does not contain sufficient iodine?

Q. Addition of a trace of thyroxine or iodine in water containing tadpoles will

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