Clayey soil is useful for growing plants because a) Water holding capacity in it is low

b) The percolation rate of water in it is high

c) It is rich in Humus

C.) It is rich in humus and very fertile

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