Negative feedback: If oxygen levels are low, then respiration should A. increase
B. decrease

B. Decrease

Explanation:

Positive feedback is an increase while negative feedback is a decrease.

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