Summarize the role of
microorganisms (small
organisms) in maintaining
healthy ecosystem.

microorganisms recycle nutrients. Decomposers break down organic matter of dead plants and animals. some bacteria living on the ocean floor feed on oil that seeps from the ground.

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