A scientist set up an experiment in which she planted bean seeds in two groups, A and B. Group A was fed a balanced application of fertilizer as recommended by plant growers. Group B was grown under identical conditions, except additional nitrogen was added. After one month, the group A plants displayed sparse, small leaves whereas Group B produced numerous, large leaves. What was the hypothesis for this experiment?

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.