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Blood types and Blood Components › View

White blood cells secrete proteins:

A. known as antibodies, which assist in the immune response.

B. known as viruses, which assist in the immune response.

C. known as bacteria, which assist in the immune response.

D. known as parasites, which assist in the immune response.

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Vitamins and Minerals › View

How many nutrients are present in balanced diet

A. Four

B. Five

C. Six

D. Seven

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