The energy that powers photosynthesis comes from A. oxygen.

B. water.

C. the sun.

D. chemicals.

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:

synapse nervous system

for a different answer set the answer would be because the oxygen in the water had depleted (apex)