Q: What are the smallest type of blood vessels? Choices: - viens - arteries - neurons - capillaries A:
capillaries
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Q: What is a waste product from fossil fuel burning? Choices: - smog - oxidation - hydrogen gas - co2 emissions A:
co2 emissions
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Q: In plants, pigment molecules absorb only visible light for photosynthesis. the visible light seen by humans as white light actually exists in a what? Choices: - vacuum - transparency - invisible spectrum - rainbow of colors A:
rainbow of colors
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Q: One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of what element? Choices: - methane - hydrogen - nitrogen - oxygen A:
oxygen
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