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The Primary Endosymbiosis of a Cyanobacterium by an Early Eukaryotic

Question 137

Multiple Choice

The primary endosymbiosis of a cyanobacterium by an early eukaryotic cell that led to evolution of plants occurred


A) more than a billion years ago.
B) approximately 400 million years ago.
C) approximately 400,000 years ago.
D) approximately 4,000 years ago.
E) approximately 400 years ago.

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