AP BIOLOGY

Detailed explanation-1: -nitrogen – 78% oxygen – 17% carbon dioxide – 4% other gases – 1%.

Detailed explanation-2: -Air is mostly gas The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of other gases, too, such as carbon dioxide, neon, and hydrogen.

Detailed explanation-3: -Nitrogen makes up almost four fifths of the air we breathe, but being unreactive is not used in respiration at all-we simply breathe the nitrogen back out again, unchanged.

Detailed explanation-4: -Inhaled air contains approx 21%oxygen, 0.04% carbon dioxide and 79%nitrogen while exhaled air contains approx 16% oxygen, 4% carbon dioxide and also 79% nitrogen.

Detailed explanation-5: -Answer: The exhaled air contains more carbon dioxide because the carbon dioxide produced during respiration is removed out of the body as the exhaled air during the process of respiration.