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.
(A) The rate of photosynthesis is inversely proportional to light intensity. (B) The rate of photosynthesis at 660 ppm CO2 is more dependent on temperature. than the rate at 330 ppm CO2. (C) There is no theoretical maximum for the rate of photosynthesis.