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Author Question: The accumulation of free oxygen in Earth's atmosphere began A) with the origin o (Read 1234 times)

Jesse_J

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on: Jun 13, 2013
The accumulation of free oxygen in Earth's atmosphere began
A) with the origin of life and respiratory metabolism.
B) with the origin of photosynthetic bacteria that had photosystem I.
C) with the origin of cyanobacteria that had both photosystem I and photosystem II.
D) with the origin of chloroplasts in photosynthetic eukaryotic algae.
E) with the origin of land plants.


aero

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Reply #1 on: Jun 15, 2013
I picked C and I got it right, good luck :)


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Jesse_J

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Reply #2 on: Jul 4, 2013
Thank you so much, I marked it solved ;D


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