How old, is the tree, and does this represent any kind of graph?
It is the first option. Atmospheric nitrogen is very stable so there fore hard to react with. But bacteria contain molecules that can break the bond of nitrogen.
Multiple alleles: three or more alleles for a specific gene
polygenic traits: a trait controlled by a group of nonallelic genes
I believe it is a process used by plants<span> in which </span>energy<span> from </span>sunlight<span> is used to convert carbon dioxide and water into </span>molecules<span> needed for growth. </span>These molecules<span> include sugars, enzymes and chlorophyll. Light </span>energy<span> is absorbed by the green chemical chlorophyll.</span>
