Basic Biology Terms

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Atom

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The basic unit of a chemical element.

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Carbohydrate

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Organic compounds occurring in foods and living tissues, including sugars, starch, and cellulose.

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Cell Theory

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A scientific theory describing the properties of cells, the basic unit of life.

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Cell Wall

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A rigid layer lying outside the plasma membrane of the cells of plants, fungi, and bacteria.

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Cellular Respiration

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The process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

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Chlorophyll

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A green pigment responsible for the absorption of light to provide energy for photosynthesis.

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Chloroplast

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An organelle in plant cells where photosynthesis takes place.

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Chromosome

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A thread-like structure of nucleic acids and protein found in the nucleus of most living cells.

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Constant

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A situation or state of affairs that does not change.

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Cytoskeleton

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A network of fibers that organizes structures and activities in the cell.