1. Describe the effect of standard of living on tooth decay in town A? 2. Suggest reasons why a low standard of living may have the effect. you describe in your answer of number 1?

3. Describe the effect of adding fluoride to drinking water that does not naturally contain fluoride?

4. Suggest reason for the difference in the results for town B and town C?

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)

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

What happens to the average kinetic energy of water molecules as water freezes?