TRACING THE EVOLUTION OF CELL: The Ancient Life 1

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Tracing the evolution of cell : THE ANCIENT LIFE 1


The existence of life make evident the origin of life on earth.
According to the research and estimation by scientist, it was said that earth came into existence about 4.6 billion years ago, and also chemical composition of earth surface begun to change about 3.8 billion years ago. That is, life first emerged at least 3.8 billion years ago which was approximately 750 million years after earth was formed.

 According to scientist estimation, it was recorded that the first cell were in existence about 3.5 billion years ago.The scientist believed that about 3.5 billion years ago, the first cell lived within the organic environment of the earth( carbon base environment) and used organic food for for their energy ( carbon, nitrogen etc). 
 The type of nutritional mode or chemistry observed by the scientist about 3.5 billion years ago in the first cell is some like similar to fermentation, which is a metabolic process that produces chemical changes in organic substrates through the action of enzymes, so also in the field of biochemistry fermentation can be described as the extraction of energy from carbohydrates in the absence of oxygen. The energy yield, although minimal is enough to sustain simple living things. However, organic materials ( carbon based compounds) would Soon have been used up if this were the sole source of nutrition,so as a new process had to develop.

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