ANATOMY

Detailed explanation-1: -Statement 1: During respiration, humans and animals take in carbon dioxide and release oxygen. Statement 2: During photosynthesis, plants utilise carbon dioxide and release oxygen. Q. Plants take in carbon dioxide and give out oxygen during respiration.

Detailed explanation-2: -Making oxygen before life: Oxygen can form directly from carbon dioxide in upper atmosphere. Summary: About one fifth of the Earth’s atmosphere is oxygen, pumped out by green plants as a result of photosynthesis and used by most living things on the planet to keep our metabolisms running.

Detailed explanation-3: -The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

Detailed explanation-4: -From the above information we have found that carbon dioxide is not released during photosynthesis. Instead of it oxygen is released. Hence, the correct answer is option (B). Note: All the living organisms directly or indirectly depend on photosynthesis as a source of food, energy and oxygen.

Detailed explanation-5: -Expert-Verified Answer Given statement is false. The breathed out air is rich in carbon dioxide and deficient in oxygen. As the respiratory activities result in release of carbon dioxide after utilising oxygen, the former needs to be removed from body.