Select the correct answer. Which characteristic of life distinguishes a fire and a flowering plant? A. use of energy B. movement C. growth D. defined boundary

Acid rain is the direct result of acid released by burning fossil fuels. select the best answer from the choices provided ot o f true or false

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

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?