The answers that apply include;
When orgasms started to photosynthesize, they caused the great oxygenation event. This favored evolution of aerobic organisms on the surface of the earth.
When the earth cooled, water was able to exist in liquid form and settled in the basins where life could being to spur.
Ozone (largely formed during the oxygenation event) protected genetic material from damage by UV light hence life was able to evolve on the surface of the earth
The evolving of life on Earth is caused by ;
The earth was initially void with no light and oxygen, therefore most of the organisms that existed earlier on earth were anaerobic and did not produce their food through photosynthesis.
The evolution of life on earth started with organisms ( green plants and algae ) undergoing photosynthesis in the presence of light energy utilizing carbon dioxide added by the volcanoes and water from the atmosphere to produce their food .
The Ozone layer helps prevent violent ultraviolet rays from reaching the earth which encourages the evolving of life on earth overtime.
Hence we can conclude that The evolving of life on Earth is caused by ;Organisms began to photosynthesize, The surface cooled and water condensed, Ozone formed and blocked ultraviolet rays from the sun
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