NEET BIOLOGY

Detailed explanation-1: -Photosynthesis is the process in which green plants use sunlight, along with water and carbon dioxide to make their own food. Oxygen and glucose are the by-products of photosynthesis.

Detailed explanation-2: -Plants and animals use oxygen to respire and return it to the air and water as carbon dioxide (CO2). CO2 is then taken up by algae and terrestrial green plants and converted into carbohydrates during the process of photosynthesis, oxygen being a by-product.

Detailed explanation-3: -Once they have water and carbon dioxide, they can use energy from sunlight to make their food. The leftovers from making the plant food is another gas called oxygen. This oxygen is released from the leaves into the air.