DENDROLOGY

Detailed explanation-1: -Plants supply food to nearly all terrestrial organisms. Plants maintain the atmosphere. They produce oxygen and absorb carbon dioxide during photosynthesis. Oxygen is essential for cellular respiration for all aerobic organisms.

Detailed explanation-2: -Without plants, life would not be sustained on earth. People depend upon plants to satisfy their basic human needs such as food, clothing, shelter, and medicine. To date, these basic human needs are growing rapidly because of a growing world population, increasing incomes, and urbanization.

Detailed explanation-3: -Plants supply food to nearly all terrestrial organisms, including humans. We eat either plants or other organisms that eat plants. Plants maintain the atmosphere. They produce oxygen and absorb carbon dioxide during photosynthesis.

Detailed explanation-4: -They play a pivotal role in maintaining the optimal atmospheric conditions. Plants produce oxygen through photosynthesis, without which respiration and thus life would not have been possible. Plants also recycle matter and provide many products for human use. Plants create a natural habitat for most organisms.

Detailed explanation-5: -Plants are important for the survival of living organisms as they absorb CO2 and release O. They are also the main producers of food because of the presence of chlorophyll pigment. They provide us with day-to-day life things such as wood, timber, paper, etc.