B.cell wall
Cellulose is an important structural component of the primary cell wall of green plants.
O blood has no<span> antigens and is referred to as </span>universal donor blood<span>, so that </span>will<span> not cause a reaction. So, a </span>person<span> with </span>AB blood has<span> all of the antigens that are possible, and an O negative </span>person has no<span> antigens that would cause a reaction.</span>
Autotroph: Any kind of plant because they can create their own food.
Heterotroph: Humans because we can't create our own food.
