The most important phagocytes are
a. lymphocytes and basophils.
b. basophils and mast cells.
c. neutrophils and basophils.
d. neutrophils and macrophages.
e. macrophages and lymphocytes.
Answer: d
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Biology
- The osmoregulatory/excretory system of a freshwater flatworm is based on the operation of _____.
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