A scientist designed an experiment to examine the effects of exercise on respiration. He collected the volume of the gases produced by a group of people as they were running, walking, and at rest for 5 minute time periods. Which question can the scientist answer with his experiment?
a
Does decreased activity require a higher amount of oxygen than increased activity?
b
Does increased activity lead to a higher volume of carbon dioxide produced?
c
Does the amount of time spent being active affect the volume of carbon dioxide breathed in?
d
Does the amount of oxygen produced during physical activity depend on time?
b
Does increased activity lead to a higher volume of carbon dioxide produced?