Answer:
The answer is autotrophs
Explanation:
During the early days of the Earths life there was no oxygen but there was plenty of CO2 which the autotrophs took and used as food while discarding the excess which was the oxygen.
Answer:
b
Explanation:
its in a quizlet created in 2017
Viruses have not a nucleus, but they have viral DNA that they can transplant into other healthy cells to infect them.
B a virus inserts its genome into the host cell. A bacterium does not
To see if the original results are reproducible