The most important life sector 10 top-level creation (5)

Photosynthesis: Alison George

For life, almost no invention as from the Sun's ability to capture the energy that, with such a far-reaching importance. Photosynthesis thoroughly changed the face of this planet, it transformed the atmosphere composition and form a protective screen make the Earth from deadly radiation.

If no photosynthesis, the atmosphere is almost no oxygen, no plants and animals, only microbes on the original mineral soup and carbon dioxide to residual gasping. Photosynthesis to life free from those constraints, it produces oxygen for the emergence of complex life.

Photosynthesis is the driving force of life on Earth

Before the advent of photosynthesis, life is the subject of such as sulfur, iron, methane chemical substances such as the energy source of single-cell micro-organisms. Then, in about 35 million years ago, perhaps earlier, a group of bacteria evolved from the Sun gets energy capacity to help synthesis of carbohydrate to meet its growth and energy needs. It is not clear how they developed it skills, but genetic studies show that gets light "instruments" is determined by the molecular energy transfer between work of protein evolution. So they came. photosynthesis

But this process does not produce early versions of oxygen. It uses of hydrogen sulphide and carbon dioxide as raw materials, build carbohydrates and sulfur as final products. In a later still uncertain times, the new evolution of photosynthesis, which utilizes water and different resources, producing oxygen this by-product.

In the early days, oxygen will poison the lives. Until some Microbial evolution out bear oxygen and ultimately use it as an energy source mechanism, atmospheric oxygen content began to improve. It is a very important discovery: aerobic metabolism of carbohydrates for energy efficiency is anaerobic metabolism of 18 times.

Life on Earth from becoming more dynamic, developing complex multicellular life forms (including plants, they absorb a bacteria called blue with bacterial photosynthetic function as its photosynthesis) ready. In fact, our life on Earth by the use of energy is directly or indirectly by photosynthesis.

In providing an effective way of metabolic nutrition, photosynthesis manufactured oxygen can also contribute to the protection of life. The Earth is in a constant from the Sun's deadly ultraviolet radiation bombardment of the stream. Let the atmosphere full of oxygen is a byproduct of the process, from the surface of 20 to 60 km height distribution of the ozone layer, the most unwanted it filter in addition to UV. This umbrella makes life away from the ocean haven, move to the dry land.

"It has changed the composition of the atmosphere and the Earth is under the protection of shielding"

Today, the planet every biochemical process essentially are ultimately dependent on solar energy input. A deep breath, thanked those original anaerobic microorganisms of biochemical creativity.

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