please people who have taken Project: Analyzing the Effects of the Environment on Traits before please help me i'm stuck

What might explain the real-world results, show in the graph to the right, for one class of twenty students? check all that apply.

The krebs cycle is also known as the calvin cycle pyruvic acid cycle carbon - oxygen cycle citric acid cycle

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians? a. a b. e c. f d. g