AP BIOLOGY

Detailed explanation-1: -The percentage of CO2 in inhaled air is 0.04% whereas in exhaled air it is 4.4%. Therefore, we can say that exhaled air has more percentage of carbon dioxide than in the inhaled air.

Detailed explanation-2: -In turn, exhaled air contains: oxygen – 17% carbon dioxide – 4%

Detailed explanation-3: -Solution : True. During the breathing process, we inhale air and use up the oxygen of inhaled air and exhale air with high percentage of CO2 than inhaled air.

Detailed explanation-4: -Exhaled air contains 16.4% oxygen and 4.4% carbon dioxide.

Detailed explanation-5: -We breathe in oxygen and some of this carbon dioxide. When we exhale, we breathe out less oxygen but more carbon dioxide than we inhale. The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat.