An organism's "fitness" (in terms of natural selection and evolution) is determined by: 1.Its size
2.Its ability to survive and reproduce
3. It's age​

Prokaryotic and eukaryotic cells are different in many ways other than the presence or absence of a nucleus. if both archaebacteria and eubacteria are prokaryotic cells, then why are archaebacteria more closely related to eukaryotic cells than they are to eubacteria?