Differences between comb jellies and jellyfish include that
O comb jellies have much more powerful stinging tentacles.
O comb jellies have cilia on their surfaces.
O comb jellies lack the characteristic cnidarian body shape.
O comb jellies have cilia on their surfaces and lack the characteristic cnidarian body shape.

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?