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What do most ecosystems get energy from?

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What cycle is frequency measured in per second?

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What cycle completes the breakdown of glucose begun in glycolysis?

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What is a mixture of potassium nitrate, sulfur, and charcoal?

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What causes continents to drift closer to the poles or the equator?

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What is divided during cytokinesis?

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What can be thought of as the fundamental unit of life?

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What consists of a nitrogen atom bonded to some combination of carbons and hydrogens?

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What is an involuntary muscle contraction that moves rapidly along an organ like a wave called?

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What are the smallest type of blood vessels?

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What connects the peripheral nervous system to the central nervous system?

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What falls roughly in the middle of the electromagnetic spectrum, having shorter wavelengths and higher frequencies than microwaves, but not as short and high as x rays?

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What helps amplify the effects of extracellular signals?

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What is a fluid-filled body cavity that is completely enclosed by mesoderm called?

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What compound has positive and negative ions?

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What is a disease that can be spread from animals to humans called?

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What events, resulting in death of over half of animal species, have occurred on earth at least five times in the past 540 million years?

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What color is the brittle metalloid tallurium?

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What has high surface tension because of extensive hydrogen bonding?

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What do cells of dermal tissue secrete?

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