Which statement about ecosystems is true ? A. Ecosystems are always a few square meters at most
B. ecosystems are exactly one square kilometer
C. ecosystems are always larger than a biome
D. ecosystems are always smaller than a biome

B po sana makatulong sayo

i think it would be c

hope this : )

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