Q: The thin scale-like or flat shape of what cells fits their primary function, to provide a smooth and protective surface? Choices: - technique epithelium - kind epithelium - basic epithelium - simple epithelium A:
simple epithelium
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Q: What causes acid rain, ozone depletion, and global warming? Choices: - ozone layer - water pollution - radiation - air pollution A:
air pollution
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Q: What type of structures evolved to do the same job by unrelated organisms? Choices: - symmetrical structures - primal structures - dioxide structures - analogous structures A:
analogous structures
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Q: What type of gas are stars made up of? Choices: - water vapor - freon - calcium - hydrogen A:
hydrogen
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