In order for a genetic mutation in a species to result in the formation of a new species, what must occur?
a) the original species must become extinct.
b) the new species must be unable to breed with the original species.
c) the new species must be visibly different from the original species.
d) the new species must have a larger population than the original species.

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.