What is photosynthesis?
Photosynthesis is a technique for converting sunlight into energy that has been using certain organisms for about 3.4 billion years. The basic formula involves the conversion of carbon dioxide and water into glucose and oxygen using reactions of light dependent. Photosynthesis appeared rapidly after the establishment of life itself, which was assumed that this occurred 3.5 billion years ago after the Earth's crust was cooled. The first photosynthetic organisms were ancestors of modern cyanobacteria.
Photosynthesis takes place inside chloroplasts, special organelles located in plant cells and other photosynthetic organisms. Choloroplastics are green because they use pigment chlorophyll. The primary organs of the sun -absorbing plants are leaves. Although chloroplasts are located in cells throughout the plant, the density of chloroplasts is by far the highest on leaves, where between 450,000 and 800,000 chloroplasts can be found in each square millimeter.
chlorinally assume that the coatings come from the photosynthetica bacteria with which they have much in common. Like eukaryotic (complex) cells, mitochondria, chloroplastics are assumed that they come from extremely close symbiotic relations between early microbes, so close that they have become part of the same inseparable entity.
One of the by -products of the photosynthesis is oxygen, a molecule that people and other animals need to live. Although Oxygen brings life today, it brought death during a cataclysmatic event two billion years ago. At that time, the Earth's atmosphere contained small oxygen, and large iron rocks could be exposed to a surface without rust. Then, during a geologically sudden period consisting of several decades of millions, photosynthetic cyanobacteria producing oxygen developed and covered the ground, produced a massive amount of oxygen and caused mass extinction of evolutionary lines that are not accustomedconcentration of atmospheric oxygen. This is known as an oxygen disaster.
Today, the atmosphere is about 23% oxygen and the rest of the nitrogen. The necessity of oxygen from plants is another reason why we should discourage the destruction of rainforests around the world, especially in the Amazon.
photosynthetic organisms serve as the basis of any ecosystem. They are referred to as producers in this role. The organisms that consume them are therefore called consumers.