The focus on how mental activities help a person adapt to his or her environment is known as

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

the answer is c. it will give up it's valence electron to the other atom.

the answer is d p: cell, q: organ, r: organ system, s: tissue

i am sorry but i need more information and a picture.