It is either carcinogens or viruses (I think the first) I hope this helps!
Professionals that study and make predictions about human population are called demographers.
<u>Neptune</u> takes the longest amount of time to complete its orbit.
#6 is A. They are all composed of one or more cells.
Enzymes are made of strings of amino acids chemically bonded to one another. These bonds give each enzyme a unique structure, which determines its function. They mostly break down carbohydrates and fats. Once a protein source reaches your stomach, hydrochloric acid and enzymes called proteases break it down into smaller chains of amino acids. Amino acids are joined together by peptides, which are broken by proteases.
