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Lorico [155]
3 years ago
15

Which of the following gases was not believed to be present on earth at the time of its formation 4.6 billion years ago?

Biology
2 answers:
Burka [1]3 years ago
8 0
Almost possitive it is oxygen cause there was no ozone
telo118 [61]3 years ago
7 0

The correct answer is Oxygen

When the early earth was formed there were no oxygen in the atmosphere of earth although it was present in the interiors of the earth. The atmosphere of earth was not always full of oxygen as of now, the cyanobacteria were the first organisms to produce oxygen on earth's atmosphere by the process of photosynthesis. After the evolution of oxygen on earth the animals like dinosaur and other reptiles evolved on earth.






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4 0
3 years ago
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Stolb23 [73]

Answer:

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Explanation:

7 0
3 years ago
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4 0
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5 0
3 years ago
What would you expect to be different about a muscle cell in an animal? Why?
nekit [7.7K]
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Hope it’s useful
3 0
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