Q.Addition of trace amount of Thyroxine in water containing tadpoles will :-
(a)kill the tadpoles.
(b)keep them in larval stage
(c)hasten metamorphosis
(d)slow down metamorphosis.
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The correct option is (c) hasten their metamorphosis.
Explanation: Thyroxine controls tissue differentiation and metamorphosis of tadpole larva into frog. Gundernatch (1912) proved that metamorphosis of tadpole into adult frog is controlled by thyroxine. Addition of thyroxine in water will hasten the metamorphosis.
Explanation: Thyroxine controls tissue differentiation and metamorphosis of tadpole larva into frog. Gundernatch (1912) proved that metamorphosis of tadpole into adult frog is controlled by thyroxine. Addition of thyroxine in water will hasten the metamorphosis.
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