Q: Blood flows into the kidney through which artery? Choices: - main artery - blood artery - pulminary artery - renal artery A:
renal artery
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Q: While some climate regions have multiple layers, arid regions are poor for development of what? Choices: - rain - plants - minerals - soil A:
soil
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Q: Are coral reefs found in warm or cold water? Choices: - cool - cold - both - warm A:
warm
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Q: What important and unusual physical property (for birds) do ostriches and penguins share? Choices: - waterproofness - webbed feet - bonelessness - flightlessness A:
flightlessness
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