Describe a common biotic and a common abiotic component of two terrestrial ecosystems. Then, describe a common biotic and a common abiotic component of two aquatic ecosystems.(2 points)

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

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