Question

mechanism of regulation through hormones in amphibians

Answer 1

The thyroid gland secretes thyroxine (TH), a hormone essential for the growth and development of all vertebrates including humans. To understand TH action, the Donald Brown lab studies one of the most dramatic roles of the hormone, the control of amphibian metamorphosis—the process by which a tadpole turns into a frog. He studies the frog Xenopus laevis, from South Africa, because it is easy to rear. Events as different as the formation of limbs, the remodeling of organs, and the resorption of tadpole tissues such as the tail are all directed by TH. How can a simple molecule control so many different developmental changes? The hormone works by regulating the expression of groups of genes. It instructs some genes to absorb the tail and gills and others to start new tissues and organs.

MARK BRAINLIEST..