What part of the carbon cycle is represented by #4?
a. precipitation
b. assimilation
c. combustion
d. evaporation

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?

How does photosynthesis show the conservation of mass and energy?

How does science influence the decisions made about social, economic, and political issues?