What is the process where by stars create elements heavier than hydrogen? A. nuclear fusion

B. atom splitting

C. atomic growing

D. hydrogenation

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

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?

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.