What type of noun cannot be perceived by the senses?

Abstract noun

The type of noun that cannot be perceived by the senses is abstract noun.

Abstract nouns are nouns that cannot be perceived with the five senses. Abstract noun describes things that cannot be touched, seen, heard, tasted, or smell. Abstract noun include feelings, ideas, concepts, aspect, and qualities. Common examples of abstract noun include anger, bravery, calm, peace, love, trust, and progress.

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

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects