Which scenario is an example of a functional adaptation? A. A male bird lets out a mating call to attract a female bird. B. Poison dart frogs produce a toxic venom that they can secrete out of their skin. C. Cobras elongate their bodies and hiss when they’re threatened. D. The color and shape of a flounder allow it to camouflage itself on the sea floor.

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.