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a chemical substance that an organism needs to survive


an organism that obtains energy by feeding on other organisms


when organisms use chemical energy to produce carbohydrates


the portion of Earth and its atmosphere that contains organisms


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


the study of the biosphere

primary producer

an organism that uses chemical or light energy to produce its own food supply


all the organisms in one area and their physical environment

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