Dependent would be amount of colds.
Controlled would be amount of vitamin C taken.
Independent could be the fact that vitamin C will be taken daily.
Amino acids make up proteins. ansd DNA is transcripted to make RNA which is transported to ribosomes out of the nucleus which then reads the codons to choose amino acids that combine to form a polypeptide chain. the polypeptide chain that's long enough will make a protein which gives you your traits
During early civilization, the main source of fresh water was from a river. Nowadays, we have reservoirs and lakes to get fresh water. <span />
