In the figure illustrating the typical enzyme reaction, which is a substrate reactant?

a
b
e
a or b
c
d
c or d

What are some things that limit population growth?

Which must be kept in mind when determining if an explanation is correct? check all that apply.which must be kept in mind when determining if an explanation is correct? check all that apply.

Recommend a strategy for incorporating sustainable human activity into a tropical rain forest biome.