A phyloGENETIC tree is not the same thing as a taxonomic tree, which is what Cal described. rRNA and molecular studies are used in phylogenetics to determine relations between species.
1 As the light intensity increases, the rate of photosynthesis increases. 2  However, the rate will not increase beyond a certain level of light intensity. 3  At high light intensities the rate becomes constant, even with further increases in light intensity, there are no increases in the rate.
Carbon dioxide and rate of photosynthesis. An increase in the carbon dioxide. concentration increases the rate at which. carbon is incorporated into carbohydrate. in the light-independent reaction, and so. the rate of photosynthesis generally. increases until limited by another factor.