Answer:
<h2>Photosynthesis requires energy to build organic molecules.</h2>
Explanation:
Photosynthesis requires energy to build organic molecules.
Remove brackets before and after requires and comma in the sentence, it will be correctly punctuated as above.
<span>When a gene changes within a population over time, it is referred to as evolution. This refers to a long but steady rate of mutations that occur in genes of organisms within the environment. A lot of factors affect a population's evolution (e.g. climate, reproduction, food source) and it is a determinant whether a species will survive for the next generations. </span>
