Ques:Q: Antibodies also mark pathogens for destruction by which cells? Choices: - interferons - leukocytes - platelets - phagocytic A:

Ans:phagocytic
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Ques:Q: A major source of primary pollutants is the burning of oil and coal, which are types of what? Choices: - erosion fuels - renewable fuels - greenhouse gases - fossil fuels A:

Ans:fossil fuels
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Ques:Q: What are gymnosperms lacking compared to most angiosperms? Choices: - muscle elements - use elements - vascular elements - vessel elements A:

Ans:vessel elements
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Ques:Q: Do most substances increase or decrease in size when they change from a liquid to a solid? Choices: - increase - stay the same - it is unable to be measured - decrease A:

Ans:
decrease
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