AP BIOLOGY

Detailed explanation-1: -Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel.

Detailed explanation-2: -The products of photosynthesis are glucose and oxygen. Although the hydrogen atoms from the water molecules are used in the photosynthesis reactions, the oxygen molecules are released as oxygen gas (O2). (This is good news for organisms like humans and plants that use oxygen to carry out cellular respiration!)

Detailed explanation-3: -The light-dependent reactions and oxygen by-product This means that oxygen is a by-product of photosynthesis. Oxygen is produced when light energy is absorbed by chlorophyll molecules located within the leaf cell walls. Chlorophyll molecules contain photosensitive atoms, which become excited when exposed to light.

Detailed explanation-4: -Final answer: As a result, by-product of photosynthesis is oxygen.