Two views of a kidney. Which level of organization is shown in the diagram? organ ,tissue, organ system, cell

How do adaptation affect a species?

What percentage of light hits earth's surface directly?

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?