Tonya used a microscope to observe five kinds of organisms in a sample of pond water. She wants to identify each organism using the dichotomous key
below.

Which of these statements is true?
O A. The key is not detailed enough to identify all the organisms.
B. The key can be used to identify the scientific name of each
organism
O C. The key can be used to find only the common names of each
organism
O D. The key cannot be used to identify any organisms that live in
ponds

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)