An elementary student decides to conduct an experiment comparing the effectiveness of two commercial soaps as cleaning agents ("soap 1 and soap 2"), using each in paired tests of different types of stains and colors of cloth, where the only variable is the soap used. the student will use the judgment of classmates to decide if the stains remain equal or if soap 1 cleans better than soap 2. however, the elementary student made no prediction of which soap is expected to perform best.

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.