why oxygen is present only on earth
Answers
Answer:
because of trees and plants
Answer:
Hi bro (do you know me?)
Explanation:
700 million years ago there was no Oxygen and their Huge amounts of helium and hydrogen in the sky.After after that when the organisms start living in water like the primitive bacteria.
These bacteria could do photosynthesis.
In this process, oxygen is released.
After years passed by these activity of photosynthesis increased and also increase the level of oxygen in the atmosphere.You could not imagine the amount of oxygen that was released by primitive bacterias living in water. But your question is not specific as oxygen is not only present on earth but also present on exoplanets (Like kepler182-b). This life source(Oxygen) can be present anywhere in our universe and we are just using its 0.000000 000000000000000000000000000000000000000000000000000000000000000000000000 and many trillions of zeros and 1%!!!!!!
Hope it helps you and your Doubts are clear.
If you need more answers I will be always be ready to answer your question.
I think after all these facts you should make me brainliest.
If you know me then answer one of my questions
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