I like rainbows and fort nite what am i

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

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?

Which of the following is a testable hypotheses?