alleryMetamorphosis in frogs (tadpole to adult) is regulated mainly by:
AThyroid hormones (thyroxine, T3 and T4)
BAdrenal hormones (cortisol from cortex)
CPituitary growth hormone (GH)
DInsulin from the pancreas
Answer & Solution
Correct answer: A. Thyroid hormones (thyroxine, T3 and T4)
THYROID HORMONES (thyroxine T4, triiodothyronine T3) trigger metamorphosis.
Without iodine (precursor), the thyroid can't make T3/T4, and the tadpole remains as a tadpole.
Demonstrates hormonal control of development.
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