Why are archaea in a different domain from bacteria?

a. they had independent evolutionary development.

b. they shared a common ancient ancestor.

c. they are eukaryotes, but bacteria are prokaryotes.

d. they are multicellular, but bacteria are unicellular.

-efficient data acquisition

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yes, because even though a theory has a  lot of evidence to support it, it is not always true

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.