Sex-change is a wonderful problem in terms of physiology, in the sense that it involves all levels of solving a physiological problem: everything from DNA to behavior. The solution to the mystery of sequential hermaphroditism is centered around physiological mechanisms. The dilemma of sex-change also helps reveal the breadth of the field of physiology. As with any other physiological process, there are several components to this mechanism.
A pair of Amphiprion akindynos, N. GBR, Australia. Photo by C.L. Rice
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