Beginning#2 (How life on earth started according to science)

According to science , life on earth started about 3.5 billion years ago as per the age of the oldest rocks with fossil evidence of life in them. Before coming to the topic that how life began, we must know the types of living beings existing on our mother Earth . So the life is divided into following two parts:-

• Autotroph
• Heterotroph     
  
  
  

Autotroph are the one who produces their own food. (e.g. Plants).

Heterotroph are the one who depends on others. (e.g. Animals).

So from this we can conclude that the previously or the first born creatures might not be heterotrophs as they were not having any food at that time so they might be producing their own food. Also as the sunlight was harmful for them as it was not purified by ozone layer like today they may not be able to survive in land, so we can conclude that the initial beings took place in the ocean. Ocean resist sunlight because the sunlight is reflected back by the air coming from the pores at the bottom of the ocean (pores suck water from ocean and take it deep inside the hot core and then return water in the form of gas).

Initial beings were unicellular like Bacteria, Prokaryotes(first single cell organism)

Cyno-bacteria(first multicellular being) is responsible for the greatest mass extinction as well as for our creation. cyno-bacteria produces oxygen for photosynthesis and oxygen was initially toxic for other unicellular beings which lead to mass extinction. Also methane was acting as a potent greenhouse gas that kept the earth warmer but now after formation of excessive amount of oxygen it reacted with methane to form CO2 and H2O which do not trap the earths heat and hence the thinner atmosphere caused the first and longest ice age in history of earth (2.4bn-2.1bn yrs). So earth became a massive giant snowball.

Eventually, situations settled back to normal & oxygen also settled back to normal amount(21%).At that time some other prehistoric microbe Swallowed cyno-bacteria so that the microbe gained the property of Photosynthesis & the cyno-bacteria became Chlorophyll which is founded in plant today to attain photosynthesis. so it concludes that  microbe who swallowed the cyno-bacteria is plants first ancestor

Eventually the life started..........