Submitted by admin on Fri, 04/18/2014 - 15:50
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:
Two key metabolic factors in photosynthetic cells have been shown to regulate photosynthesis.
In photosynthetic organisms light is an essential factor for growth and development.
difficulty:
hard
toefl frequency:
1
toefl classification: