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the process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches.

cellular respiration

the process by which cells use oxygen gas to break down carbohydrates, releasing chemical energy that the cell can use


organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer


organism that obtains energy from the foods it consumes; also called a consumer


the form of sugar that circulates in the blood and provides the major source of energy for body tissues


the chemical formula for glucose


the small openings on the undersides of most leaves through which oxygen and carbon dioxide can move


organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy


green pigment in plants that absorbs light energy used to carry out photosynthesis


the cells powerhouse, turning food into energy; the organelle where cellular respiration takes place.


a colored chemical compound that absorbs light


the process by which cells break down carbohydrates to release energy without using oxygen

lactic acid

waste product produced by fermentation; causes muscles to be sore

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