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leonid [27]
3 years ago
7

According to scientific evidence, earth’s earliest atmosphere lacked oxygen. Over time, oxygen was added to the atmosphere.

Biology
2 answers:
Ghella [55]3 years ago
5 0
<span>The following statements explain how oxygen was introduced into the earliest atmosphere of the Earth and how the presence of oxygen affected life on Earth.
</span><span>
B) Oxygen is needed to carry out many life processes. The addition of oxygen to the earth's atmosphere assisted with the development of eukaryotic organisms.
</span>
D) Photosynthesis was carried out as cyanobacteria evolved. Oxygen is a product of photosynthesis.
Travka [436]3 years ago
4 0
The correct answers are:
 B) Oxygen is needed to carry out many life processes. The addition of oxygen to the earth's atmosphere assisted with the development of eukaryotic organisms.
<span>D) Photosynthesis was carried out as cyanobacteria evolved. Oxygen is a product of photosynthesis.</span>
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