Answer:
Cyanobacteria are responsible for first adding oxygen to the Earth's atmosphere.
Answer:
Scientists with different educational backgrounds can come to different interpretations of the same data.
Choice A is correct
Explanation:
A biologist is a scientist with specialized knowledge in the field of biology while a geologist is a scientist who studies the matter that make up the Earth as well as the processes that shape them.
Both scientists came to different interpretations of the same data since they have different educational backgrounds.