Oxygen.
Oxygen was fatal when organisms started using photosynthesis, this event was known as the Great Oxidation Event.
2.0 because 2.05 is about two and a half where as 2.0 is considered to be a whole number , hope this helps
Hey there,
Your answer is:
<span>Hydrogen turns into helium.
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Hope this helps...Good Luck
Well lets see here, The definition of population is a particular section, group, or type of people or animals living in an area or country. So it would be D.<span>
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