Question

which one of the following elements must be available in sufficient quantity in the water of a pond in at tadpoles are growing?

Answer 1

there must be iodine in the pondwater as it is necessary for the metamorphosis process,I think

Answer 2

Iodine elements must be available in sufficient quantity in the water of a pond in at tadpoles are growing .

Explanation:

• Thyroxin hormone is the hormone that is required for the growth of the tadpoles. Thyroxin hormone produces by the thyroid gland in the presence of Iodine. That’s why Iodine should be available in sufficient quantity in the water of the pond.
• If iodine is not available in the diet, then the thyroid may produce an insufficient hormone which will affect the process of metamorphosis.  If water is iodine-deficient, in which the frog lays an egg, then tadpoles hatched from these eggs will not grow into adult frogs.

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