Question

Thyroxine controls ___ in frogs and the development of ___ and ___ during embryonic development of other vertebrates. Thyroxine production requires the presence of ___ in the diet.
Select the correct sequence of words to complete the above passage.

• A. Development, Circulatory system, Muscles, Iodine
• B. Metamorphosis, Circulatory system, Muscles, Calcium
• C. Development, Bones, Nervous system, Iron
• D. Metamorphosis, Bones, Nervous system, Iodine

Answer 1

The correct option is D

Metamorphosis, Bones, Nervous system, Iodine

The process of metamorphosis in frogs occurs in the presence of the thyroxine hormone. The thyroid gland secretes thyroxine (TH), a hormone essential for the growth and development of all vertebrates including humans. It helps in the development of bones and nervous system. Iodine consumption in an optimal quantity helps regulate the production of thyroxine hormone.