During ventricular systole, the Group of answer choices atria are contracting. blood is entering the ventricles. pressure in the ventricles remains constant. pressure in the aorta remains constant. AV valves are closed.

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:

answer; lower are;

answer///africa and asia;

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