Plants are living organisms that belong to the kingdom Plantae. They are autotrophs — they make their own food using sunlight, water, and carbon dioxide through a process called photosynthesis.

• ›Found almost everywhere on Earth: forests, deserts, oceans
• ›About 3,50,000 species of plants are known
• ›They are the base of nearly every food chain on Earth
• ›Plants release oxygen (O₂) as a by-product of photosynthesis

Understanding plants is essential for ecology, agriculture, and life science — all key topics in BPSC TRE-4 Science.