Which of the following are compounds? O H20 and O2, but not CH4
O O2 and CH4, but not H2O
O H20 and CH4, but not O2
O H20, O2, and CH4

What is being converted during photosynthesis

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?