The pathway of cellular respiration that require oxygen are said to be what, pathways that do not require oxygen are said to be what

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:

the answer is 100% density i've answered this question before and done the quiz myself.

i think its both a and b