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Geologic Time Quick Check

4 of 54 of 5 Items
Question
How did the success of photosynthetic bacteria change Earth’s atmosphere?(1 point)
Responses

increased oxygen concentration
increased oxygen concentration

increased hydrogen concentration
increased hydrogen concentration

decreased hydrogen concentration
decreased hydrogen concentration

decreased oxygen concentration

1 answer

The correct response is:

increased oxygen concentration

Photosynthetic bacteria, such as cyanobacteria, played a crucial role in producing oxygen as a byproduct of photosynthesis, significantly increasing the concentration of oxygen in Earth's atmosphere.

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