What does it mean if a molecule is moved against the concentration gradient?

answer; i believe that the correct answer is (light);

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:

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves