Which two factors are responsible for seasons on Earth? A. Greenhouse gases and ozone in the atmosphere
B. Earth's tilted axis and its rotation around it
C. Trade winds and sea breezes
D. Earth's tilted axis and its revolution around the sun

Energy derived from hot rocks and fluids beneath the earth’s surface is

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.

20 the main source of energy for our planet comes from the