3) given two areas with equal sunlight and available water. area i has a high amount of atmospheric carbon dioxide while area ii has a low amount of atmospheric carbon dioxide. how does the rate of photosynthesis in area i compare to that in area ii? a) atmospheric carbon dioxide has no affect on the rate of photosynthesis. b) the rate of photosynthesis increases with a decrease in carbon dioxide. c) the rate of photosynthesis increases with an increase in carbon dioixde. d) the level of carbon dioxide increases with the level of available oxygen.

Considering the yellow and green pea color phenotypes studied by gregor mendel: a. what is the biochemical function of the protein that is specified by the gene responsible for the pea color phenotype? (1 point) b. a null allele of a gene is an allele that does not specify (or encode) any of the biochemical function that the gene normally provides (in other words, either no protein at all or only non-functional protein is produced from it). of the two alleles, y and y, which is more likely to be a null allele? (1 point) c. in terms of the underlying biochemistry, why is the y allele dominant to the y allele? (2 points) d. why are peas that are yy homozygotes green? (1 point) e. the amount of protein produced from a gene is roughly proportional to the number of functional copies of the gene carried by a cell or individual. what do the phenotypes of yy homozygotes, yy heterozygotes, and yy homozygotes tell us about the amount of sgr enzyme needed to produce a yellow color? explain your reasoning. (2 points)