The answer is Permian-Triassic extinction.
The Permian-Triassic extinction was 252 million years ago. It is known as The Great Dying because about 95% of all species died out due to environmental changes (volcanic eruptions, dry climate, melting of ice sheets, etc). This is also the only event in which many insect species wiped out.
<span> C - nitrogen fixation, ammonification and nitrification </span>
Genus comes first so genus
Answer:
The correct answer is oxygen.
Explanation:
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