Sagot :
Answer:
As the oxygen content of the atmosphere increased, the ozone layer formed and began to shield the surface of the Earth from the harmful ultraviolet light. This allowed life forms to evolve to survive on the surface of the oceans and on land, and also allowed organisms who metabolize oxygen (like us!) to develop.
Explanation:
Answer:
thr oxygen conten of the atmosphere increased theozone layer formed and began to shield the suface af the earth from the harmful ultraviolet light
Explanation:
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