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What Role Did Cyanobacteria Play in Shaping Earth's Environment

Question 16

Multiple Choice

What role did cyanobacteria play in shaping Earth's environment?


A) They are single-celled organisms that are detritivores.
B) They produced oxygen, which led to changes in Earth's atmosphere.
C) They evolved into the first plants that colonized land.
D) They are the ancestral form of all life on Earth.

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