Q. Addition of which element in water speed up the metamorphosis in frog tadpole larva?
A) I₂
B) K
C) Na
D) Cl
Explanation
The metamorphosis of frog is controlled by the thyroid hormones that contains iodine element. Thus, addition of $I_{2}$ element in water speeds up the metamorphosis in frog tadpole.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.