<span>ENZYMES ARE PROTEINS. All proteins are made up of amino acid.. Enzymes are used as catalysts in metabolic reactions in living organisms. They help to speed up the rate of chemical reaction but they are not used up in the reaction. Enzymes requires optimum conditions to function optimally. </span>
The correct answer is D, white blood cells.
We know that red blood cells deliver nutrients and are not apart of the immune system; platelets are responsible for coagulation, which has nothing to do with the immune system, and plasma is a substance that, again, has nothing to do with immunity. White blood cells are the only things that fight disease (antibodies are white blood cells)!
I hope I helped!
(By nothing I meant very little to none).
Answer: mercury (i think)
Https://quizlet.com/59754152/chapter-8-flash-cards/ go here for for question
Comparative with a wide range of variables
