Question

which of the following elements should be available in water for metamorphosis of tadpoles?
a. iodine
b. Sulphur
c. chlorine
d. carbon

Answer 1

I think chlorine is the right answer

Answer 2

Iodine should be available in water for metamorphosis of tadpoles, hence option A is correct.

Iodine is required for the proper functioning of thyroid gland which produces thyroxine. Thyroxine is required for metamorphosis of tadpoles to frogs. Metamorphosis is the stage when limbs and lungs develop and the tail disappears.