Answer:
Cyanobacteria were photosynthetic and slowly changed the earth's atmosphere from CO2 rich to O2 rich. Photosynthetic cyanobacteria evolved by 3.5 billion years ago and greatly modified earth's atmosphere.
Answer: sulfur? sorry if im wrong tho
is 1
Explanation:
because 1+0+0+0+0+0+0+0+0+0+0+0+0+0=1
Answer: Here's The Cell Cycle Concept Map
