Answer:
Essential amino acids
Explanation:
The amino acids that cannot be synthesized by a cell and must be provided by any other source are called essential amino acids. For instance, proteins are made up of 20 standard amino acids. The cells in humans are incapable of synthesizing many amino acids which in turn are called essential amino acids. Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are the essential amino acids that must be taken in diet.
Is there anyway you can elaborate a little more so I can answer it more clearly? Thanks!!
Sweat would be the best choice
Answer:
Gas.
Explanation:
Gas which is present makes the three bottles different from one another. There are three factors which is used for testing of cellular respiration such as amount of oxygen consumed during this process, amount of glucose used and amount of carbondioxide produced during cellular respiration. During cellular respiration, oxygen used in order to break down glucose and releases high amount of energy with the waste materials such as carbondioxide gas.
Answer:
oxygen enters blood cells by 'diffusion'
