Many fungi grow a mass of hyphae usually hidden within the material on which it is growing. what is this mass of hyphae called

Mycelium.

Explanation:

Mycelium is a mass of thread-like hyphae that can grow on a surface, decaying material, soil or on a living tissue. It is the vegetative part of a fungus through which a fungus absorbs nutrient from the environment. They are good sources of food for soil invertebrates. They also play a major role in decomposition of plant material.

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products