Question

chemical reactions convert reactants to products. in nonliving systems, the presence of a(n) catalyst allows the reaction to proceed very quickly and have a lower activation energy. in living systems, this function is carried out by proteins called enzymes.

Explanation:

Chemical reactions transform reactants into products. Catalysts in non - living systems and enzymes (proteins) in living systems lower the activation energy, speeding up the reaction.

Answer:

The blanks are correctly filled as shown in the image: reactants, products, catalyst, enzymes, activation energy.