Which of the following is not a characteristic of bacteria? A. It contains a protective cell wall
B. It has a cell membrane
C. It lacks a nucleus
D. It is a multicelled organism

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

geologic time scale (for gradpoint) =)

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: