Question

Figure below shows the apparatus used for measuring the rate of oxygen consumption in aerobic respiration by seeds.For the first 10 minutes, the tap attached to tube A was left open and the syringe from tube B was removed. Suggest three reasons why the apparatus was left for 10 minutes

Answer 1

The apparatus was left for 10 minutes to establish a baseline measurement, ensure oxygen levels stabilize, and allow air bubbles to dissipate.

Step-by-step explanation:

The apparatus was left for 10 minutes in order to establish a baseline measurement. This allows any initial oxygen consumption to be taken into account when calculating the rate of oxygen consumption over time. Additionally, leaving the apparatus undisturbed for 10 minutes allows for the oxygen levels to stabilize, ensuring more accurate measurements of oxygen consumption can be made.

Finally, leaving the apparatus for 10 minutes also allows for any air bubbles in the apparatus to dissipate, which could potentially affect the accuracy of the measurements.