8. Cattail plants in freshwater swamps in New York State are being replaced by purple loosestrife plants.
The two species have very similar environmental
requirements. This observation best illustrates
A) variations within a species
B) dynamic equilibrium
C) random recombination
D) competition between species

competition between species (d)

Explanation:

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme