One trigger of mass movements is the pores in sediments filling with

answer; ///i believe the correct answer is (aids) acquired immune deficiency syndrome;

the answer to your question is sperm

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