What causes photochemical smog?
a. it is formed by reactions involving sunlight and nitrous oxides and hydrocarbons released from automobile exhaust.
b. it is formed from sulfur oxides and particulate matter released from combustion of combustion of heating oil and coal.
c. it is formed by reactions between cfcs from industrial processes and ice crystals in the upper atmosphere.
d. it is formed when secondary pollutants such as ozone combine with primary pollutants such as hydrocarbons in cold winter temperatures?

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)

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Apatient has an open displaced fracture of the second cervical vertebra. this is her fifth visit and the fracture is healing normally. what icd-10-cm code is reported?