The process in which an animal’s cells use oxygen and digested food molecules to release the energy in food is called A. breathing. B. cellular respiration. C. diffusion. D. gas exchange.

cellular respiration

ocean expansion, global warming is melting icebergs and causing water levels to rise.

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