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Question
The estimated production of oxygen by photo chemical dissociation of water in stratosphere is 1.5 g per metre sq. per year and by photosynthesis about ......... gm per sq. metre per year.
The estimated production of oxygen by photo chemical dissociation of water in stratosphere is 1.5 g per metre sq. per year and by photosynthesis about ......... gm per sq. metre per year.
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Solution
The correct option is B 260
During photosynthesis water molecules dissociate to form oxygen, which is fed into the atmosphere from where it is drawn in aerobic respiratory activity of living organisms to yield water molecules again. Though photochemical dissociation of water in the stratosphere has been estimated to produce about 1.5 gms of oxygen per metre sq. per year, the main process responsible for production of oxygen is photosynthesis, which has been estimated to produce about 260 gm of oxygen per sq. metre per year.
During photosynthesis water molecules dissociate to form oxygen, which is fed into the atmosphere from where it is drawn in aerobic respiratory activity of living organisms to yield water molecules again. Though photochemical dissociation of water in the stratosphere has been estimated to produce about 1.5 gms of oxygen per metre sq. per year, the main process responsible for production of oxygen is photosynthesis, which has been estimated to produce about 260 gm of oxygen per sq. metre per year.
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