B) It requires energy
D) It involves the help of carrier proteins.
Hello there!
The answer is enzymes.
Enzymes are biological catalysts, which means they decrease the amount of activation energy needed to start a reaction, therefore speeding up the rate of the reaction. They are part of the protein macromolecule group. Without them, our bodies would not process things efficiently or fast enough for us to live.
Hope I helped. Have a nice day.
Answer:
the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
