Which statement is true about the thyroid hormones? (1) they increase the rate of metabolism in cells
throughout the body. (2)they control how quickly cells use energy. (3) they are not steroid hormones.
(4) they are released by the parathyroid glands.
a. 1 only
b. 1 and 2
c. 1, 2, and 3
d. 1, 2, 3, and 4

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals