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2014-11-28T21:14:51+05:30
Due to presence of sun light
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2014-11-28T21:53:34+05:30
Plants and trees trap the sunlight and prepare food for themselves and also for others like herbivorous animals.plants prepare food from sunlight,corbondioxideand water this process is called photosynthesis. during day time sunlight will be present so, during daytime rate of photosynthesis is usually higher than that of respiration.trees are also called producers.

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