Which roles does pressure play during a volcanic eruption? check all that apply. pressure decreases as magma rises. pressure traps dissolved gases in magma. pressure increases until the volcano explodes. pressure from rocks above causes new rocks to form. pressure from expanding gases forces magma through the pipe and vent.

C

Explanation:

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: