Before this theory can be replaced, the one that must happen is : D. Scientists must test and agree on a new theory
After numerous tests are done and it's proven to be a better theory and can be more generally accepted than the previous one, that the previous theory could be replaced
hope this helps
Answer:
The one I know is plant cell has no cell wall while animal cell have cell wall
Bacteria that develop a mutation: artificial
Over a period of several thousand years: natural
Organisms that best adapt to their environment: natural
Alaskan sled dogs: artificial
Farmers only allow: artificial
