AP BIOLOGY

Detailed explanation-1: -The leftovers from making the plant food is another gas called oxygen. This oxygen is released from the leaves into the air. Take a look at the picture below to see this system in action. This leftover oxygen is really important because humans and other animals need this oxygen to live which we breathe in from the air.

Detailed explanation-2: -Humans depend on photosynthesis to make the food they consume, as a source of energy to produce heat, light, and electricity, on a daily basis. Additionally, autotrophs are producers in almost all food chains, therefore this mechanism is essential for humans as well.

Detailed explanation-3: -Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.

Detailed explanation-4: -Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product.

Detailed explanation-5: -Photosynthesis converts light energy into chemical energy that animals and people can consume. Photosynthesis reduces the carbon dioxide in our atmosphere and generates the oxygen that people and animals breathe in.