If a reaction in one direction releases energy, the reaction in the opposite direction

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Works together in the synthesis, modification, packaging, and transport of lipids and proteins