Double Helix is the three-dimensional structure of DNA
That all the continents fit together and that animals were found in areas they could not survive.
I believe that the answe is c
Answer- b
I didn't understand the question
Answer:
Explanation:
Oxygen is of no use to them, so they release it into the air. So there's a simple explanation for the Great Oxidation Event. It was the cyanobacteria, pumping out unwanted oxygen, that transformed Earth's atmosphere.
