Question

Iodine deficiency in frog will lead to

• A. Accelerated metamorphosis
• B. Inhibition of metamorphosis
• C. Development of miniature frog
• D. Development of a giant frog

Answer 1

Answer: (B)

Inhibition of metamorphosis

Metamorphosis is the development of juvenile stage of frog (tadpole) into adult. In frogs, metamorphosis is regulated by thyroxine hormone. Thyroxine is secreted from thyroid gland and synthesised from amino acid tyrosine and iodine.

Hence, iodine deficiency in frog will lead to hyposecretion i.e. less secretion of thyroxine hormone which in turn will inhibit metamorphosis.

So, the correct answer is 'Inhibition of metamorphosis'.