An abiotic effect that restricts tree growth at high elevations is
researchers refer to dna found in the cell's nucleus as nuclear dna. an organism's complete set of nuclear dna is called its genome. besides the dna located in the nucleus, humans and other complex organisms also have a small amount of dna in cell structures known as mitochondria. i hope this < 3 (srry if im too late btw)
all the cells in a persons body have the same dna and the sane genes. however, the difference between cells in different tissues and organs is that the expression of the genes differs between cells. expression means that the message from the dna is being copied and made into protein.
i just looked it up and i'm pretty sure it's nitrogen.