Why photosynthesis is considered as the basic energy source for most of the living world?

Photosynthesis, process by which green plants and certain other organisms use the energy of light to convert carbon dioxide and water into the simple sugar glucose. In so doing, photosynthesis provides the basic energy source for virtually all organisms. An extremely important by product of photosynthesis is oxygen, on which most organisms depend.

Photosynthesis occurs in green plants, seaweeds, algae, and certain bacteria. These organisms are veritable sugar factories, producing millions of new glucose molecules per second. Plants use much of this glucose, a carbohydrate, as an energy source to build leaves, flowers, fruits, and seeds. They also convert glucose to cellulose, the structural material used in their cell walls. Most plants produce more glucose than they use, however, and they store it in the form of starch and other carbohydrates in roots, stems, and leaves. The plants can then draw on these reserves for extra energy or building materials. Each year, photosynthesizing organisms produce about 170 billion metric tons of extra carbohydrates, about 30 metric tons for every person on earth.

Reasons Why Photosynthesis Is Important

• It is the number one source of oxygen in the atmosphere.

• It contributes to the carbon cycle between the earth, the oceans, plants and animals.

• It contributes to the symbiotic relationship between plants, humans and animals.

• It directly or indirectly affects most life on Earth.

• It serves as the primary energy process for most trees and plants.