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Respiration, Immune System, Blood Cells › ViewThe immune system fights diseases. The circulatory system pairs with the immune system because ___.
A. blood is made in the bones.
B. plasma carries nutrients.
C. red blood cells carry oxygen.
D. white blood cells fight infection.
Enzymes › View
What is the term for the extra energy needed to break bonds within reactants to form products?
A. Activation force
B. Transition state energy
C. Activation energy
D. Reaction energy