An experiment to measure the rate of respiration in crickets and mice at 10 degrees Celsius and 25 degrees Celsius was performed using a respirometer, an apparatus that measures changes in gas volume. Respiration was measure in mL oxygen consumed per gram of organism over several five-minute trials, and the following data were obtained. During aerobic cellular respiration, oxygen gas is consumed at the same rate as carbon dioxide gas is produced. In order to provide accurate volumetric measurements of oxygen gas consumption, the experimental setup should include which of the following? *

A substance that removes carbon dioxide gas

Explanation:

Options-

A.A substance that removes carbon dioxide gas

B.A plant to produce oxygen

C.A glucose reserve

D.A valve to release excess water

Solution -

It is given that the rate at which oxygen is consumed and the rate at which carbon dioxide is produced is same. Therefore, if we somehow are able to measure the volume of carbon dioxide, we can interpolate the rate of consumption of oxygen from it.

Hence, A substance that removes carbon dioxide gas is essential to provide accurate volumetric measurements of oxygen gas consumption

Option A is correct