Question

What was the volume change for respiration in the dark? As you already saw from earlier questions, oxygen production is fairly constant. You will not need to calculate the individual volume changes. Just subtract the original volume at min from the final reading at 120 min. Record your answer for use in a later question.

a) Volume increased by 50 mL
b) Volume decreased by 30 mL
c) Volume increased by 20 mL
d) Volume remained constant

Answer 1

The volume change for respiration in the dark remained constant.

Step-by-step explanation:

The question is asking about the volume change for respiration in the dark. We can determine this by subtracting the original volume at the minimum time point from the final reading at 120 minutes. Since the oxygen production is constant, the change in volume represents the respiration rate. From the given options, the correct answer would be (d) Volume remained constant.