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“Non-self” materials have proteins and other substances on their surfaces that the body doesn't recognize, called antigens.
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Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities.
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C because you are like a mix between your mom and your dad. This is just an example. I knew the answer, I just added that to get 20 words
I think the answer is F<span>ossil shells on top of mountains</span>
Mitosis is a process cell division, where one cell divides into two identical cells. Mitosis consists of four phases ~ prophase, metaphase, anaphase, telophase and cytokinesis
