There are two types of american rat terrier dogs those without hair and those with hair the presence of hair is a genetically determined trait. some female rat terriers with hair produce only puppies with hair, whereas other females produce rat terrier puppies with put hair. explain how this can occur

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.