Origin of Life on earth

lahiruStarred Page By lahiru, 9th Jun 2013 | Follow this author | RSS Feed | Short URL http://nut.bz/1_9pp7ee/
Posted in Wikinut>Guides>Science>Environmental Science

Origin of life on earth. Is it CREATED or is it a result of a long EVOLUTION process? Decision is yours.

A molten planet

Our solar system began to form roughly 4.5 billion years ago. In the very beginning earth was a molten planet due to high volcanism. Then gradually it began to cool and take shape. This process happened for another 0.1 billion years. This time period is called Hadean eon. It derives from the name of Greek god of the underworld Hades. With the end of the Hadean eon when solid rock formed geological traces on our planet began to emerge.

Building blocks

Then it was 3.8 billion years ago. There were oceans filled with a mixture of inorganic compounds like H2O. Atmosphere was oxygen free. But there were several gases like H2, CH4, H2O vapour, NH3, and H2S, According to primordial soup hypothesis life forms were originated by the inter-action between that atmosphere and primeval ocean. There were lot of UV radiations, lightning and volcanic eruptions during this time period. Because of the heat and sparks above mentioned gases chemically reacted with each other and formed simple carbonic compounds like Amino acids, Mono-saccharides, Nucleotides and dissolved into the primeval soup. Simple carbonic compounds reacted with each other and formed complex compounds like Proteins, Poly-saccharides, Lipids, DNA and RNA. These compounds are the building blocks of every living species and viruses which has a living non-living intermediate status.

LIFE on earth

Then it was 3.5 billion years ago. With the combination of complex chemical compounds proto-cells were originated. These cells were first life forms on earth. These proto-cells are called Coaservates. These were capable of exchange substances selectively from environment. According to their outer environment these cells began to adjust. Coacervate’s energy demand got higher when it came to a more complicated status. That was the point it began to absorb sunlight as its primary energy source. After a long evolution process of 0.8 billion years (2.7 billon years ago) first photosynthetic organism originated. These photosynthetic organisms released O2 as a result of photosynthesis. Having Oxygen in atmosphere took evolution process to a new level. Existence of oxygen was another energy source to primeval organisms. As a result of oxidative metabolism some primeval organisms evolved into simple protozoa type life forms. The increase in oxygen level of the atmosphere and its ionisation formed O3 (ozone) layer. It decreased UV radiations and it caused many climatic changes. It helped new organisms to evolve into more adapted complex and successful organisms gradually.

Tags

Cells, Evolution, Evolution Result, Evolution Theory, Evolution Vs Creationism, Evolutionary Evidence, Life, Origin, Origine Of Life, Photosynthesis, Primeval Soup, Primordial Soup, Volcanic Eruption

Meet the author

author avatar lahiru
with my education and knowledge in science i hope to become a perfect writer.my writings will focus on biology,chemistry,physics,medical sciences,technology,natural sciences.

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Comments

author avatar Melani
10th Jun 2013 (#)

a great article lahiru,

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author avatar philpalm
10th Jun 2013 (#)

A very tough subject to write upon. Some of the early plants that died also helped form the coal veins that we derived a lot of energy from.

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author avatar Sivaramakrishnan A
10th Jun 2013 (#)

We might also become history in due course as the evolutionary process is ongoing. Thanks Lahiru - siva

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author avatar lahiru
10th Jun 2013 (#)

yes indeed. we all become history in every passing moment.

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author avatar Lady Aiyanna
10th Jun 2013 (#)

Believe that Planet Earth has a way of getting what she wants as she progresses and returning back to origin of her being once she is satisfied with the result as if nothing has ever happened.
None the less, she spews ashes, shifts through dirt and rubble, cleans the messes, casts out demons plaguing her and above all loves all creation and provides for them in a way no one else has done.
We just rent her place while she owns everything.

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author avatar cnwriter..carolina
10th Jun 2013 (#)

most interesting this...thank you...

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author avatar lahiru
10th Jun 2013 (#)

:-) happy to see all your comments fellas...

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author avatar Mike Robbers
10th Jun 2013 (#)

Interesting and informative article. The subject of the origin of life is really fascinating, lahiru. Many thanks for sharing.

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