In arteriosclerosis, hardened arteries cannot expand to handle the blood that enters the vessel when the heart contracts. therefore, pressure in the artery and causes the heart to work
a) increases, more
b) decreases, less
c) decreases, more
d) increases, less

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: