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(C) The respiratory quotient $(RQ)$ is defined as the ratio of the volume of $CO_2$ evolved to the volume of $O_2$ consumed during respiration.To meas

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Respirometer

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(C) The respiratory quotient $(RQ)$ is defined as the ratio of the volume of $CO_2$ evolved to the volume of $O_2$ consumed during respiration.To measure this ratio,a device called a Respirometer is used.$A$ Potometer is used to measure the rate of transpiration.$B$ Auxanometer is used to measure the growth of plants.$D$ Warburg's apparatus is a specialized instrument used for measuring gas exchange in small samples,but the standard instrument for general respiratory quotient measurement is the Respirometer.

Which instrument is used to measure the respiratory quotient $(RQ)$?

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