Q: What is the force that pulls particles at the exposed surface of a liquid toward other liquid particles called?   A:
surface tension
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Q: Macrophages and dendritic cells are types of what"   A:
phagocytic cells
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Q: Lactose is a disaccharide consisting of the monomers glucose and what?   A:
galactose
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Q: What can be described in terms of size, density, and distribution?   A:

populations
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