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Feliz [49]
2 years ago
8

Which of the following did not occur during the Cenozoic era?

Biology
2 answers:
Vinvika [58]2 years ago
7 0
The best and most correct answer among the choices provided by your question is the second choice or letter B.

The formation of the ozone layer had not happened in the Cenozoic Era.


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
rusak2 [61]2 years ago
3 0

Answer:

Option (B)

Explanation:

When the initially occurring aquatic organisms such as the blue-green algae started to use the solar energy in order to convert the water molecules and carbon dioxide and converting them into organic compounds as well as the molecular oxygen (O₂). This is known as the photosynthesis process that produced a significant amount of oxygen in the atmosphere. These oxygen molecules, as absorbs the UV radiations emitted from the sun, it breaks the oxygen molecules and forms a single atom of oxygen. These atoms then again is added to the molecular oxygen and forms the ozone (O₃) molecule.

This is how the ozone layer has formed about 2 billion years ago.

Thus, the ozone layer did not form during the Cenozoic era.

Hence, the correct answer is option (B).

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