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photosynthesis

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definition: 
The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
sentence: 
To avoid the production of oxygen via photosynthesis, plants were kept in the dark
difficulty: 
medium
toefl frequency: 
1
toefl classification: