A, the endosymbiotic theory tells us that a looooong time ago, when there were only one-cell organisms, they kind of took in a bacteria. They profited from having a bacteria in it ( and I believe it is believed that this made it possible for organisms to have multiple cells, not sure) and these bacteria became mitonchondria/chloroplasts, thus answer A is the only one that doesn't support this theory.
Demestic or natuural/historic selection.
he is selecting the chicken he wishes to breed his rooster with making it known as demestic selection, or also called controlled breeding.
Answer:
O
Explanation:
Plz mark brainliest hope it helps
Cancer cells have abnormal nuclei
Answer:
plowing at least three times a year