20khodges 20khodges

04-08-2017
Biology

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During the Cambrian period on Earth, the ___________ layer developed along with the massive production of oxygen.
A) ozone
B) ocean
C) mantel
D) carbon dioxide

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kphung76127 kphung76127

04-08-2017

The answer is A, ozone.

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kaidanwaltonk2 kaidanwaltonk2

10-10-2019

Answer:

A) Ozone

Explanation:

I just took the test

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