How are all the species in a food chain similar to links in a metal chain? a. each species plays the same role as all the other species in the food chain. b. if one species is taken away, the whole chain will change or break. c. each species plays a different role from any other species in the food chain. d. there is an equal population of each species in the food chain.

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.