Suppose you have two minerals. one mineral fractures into rough pieces, and a second mineral breaks into pieces with smooth surfaces. what does this indicate? a. the second mineral is older than the first mineral. b. the second mineral is harder than the first mineral. c. the two minerals have a different arrangement of their atoms. d. only the second mineral has crystalline structure me

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.