During daylight hours,the rate of photosynthe | vedclass

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(D) During the day,plants perform both photosynthesis and respiration. Photosynthesis produces $O_2$ and consumes $CO_2$,while respiration consumes $O

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$50$

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(D) During the day,plants perform both photosynthesis and respiration. Photosynthesis produces $O_2$ and consumes $CO_2$,while respiration consumes $O_2$ and produces $CO_2$. In a healthy,actively photosynthesizing plant,the rate of photosynthesis is significantly higher than the rate of respiration. Experimental observations and physiological studies indicate that the amount of oxygen produced during photosynthesis is approximately $50$ times the amount of oxygen consumed during respiration in many active plants. Therefore,the ratio of oxygen produced to oxygen consumed is $50:1$.

During daylight hours,the rate of photosynthesis is higher than the rate of respiration,and the ratio of oxygen produced to oxygen consumed is ......... . (in $:1$)

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