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Biotechnology › ViewWhat is the function of a Helper T cell in the immune system?
A. Specifically recognizes and kills “altered-self” cells
B. Binds specific soluble antigens with its membrane-bound antibody
C. Specifically recognizes foreign peptides on antigen-presenting cells
D. Rapidly recognizes and kills virally infected or tumor cells
Circulatory & Respiratory System › View
What is the role of the circulatory system in the generation of energy from food?
A. The circulatory system breaks down food into simpler molecules
B. The circulatory system combines digested food with energy molecules
C. The circulatory system stores food molecules and converts them into energy
D. The circulatory system supplies oxygen from the lungs to cells for combustion of food.