In a soil profile, what is in horizon B?

A. Bedrock
B. Subsoil
C. Clay

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

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?