DENDROLOGY

Detailed explanation-1: -During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. 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.

Detailed explanation-2: -Plants take up the water that they need from the soil through their roots. Carbon dioxide is a gas found in the air; plants can take in this gas through tiny holes in their leaves. Once they have water and carbon dioxide, they can use energy from sunlight to make their food.

Detailed explanation-3: -They need two key gases: oxygen is used in aerobic respiration, where food molecules are broken down to release energy for growth. This process releases carbon dioxide as a waste product. carbon dioxide is used in photosynthesis, where the sun’s energy is harnessed to make food.

Detailed explanation-4: -Final answer: Carbon dioxide is necessary for photosynthesis as it the major raw material used to form glucose.

Detailed explanation-5: -Carbon dioxide is a necessary element of photosynthesis in plants. It is used in optimum amount by plants to make their food. But a high concentration of carbon dioxide can damage the plant. High concentration of carbon dioxide is not only harmful to plants but also to environment.