"Bacteria don't have nuclei" isn't the same thing as eukaryotic cells not having nuclei, though, as they still are functional cells with genes. The point isn't

"Bacteria don't have nuclei" isn't the same thing as eukaryotic cells not having nuclei, though, as they still are functional cells with genes. The point isn't the presence or absence of a morphological feature, it is that eukaryotic cells lacking nuclei are hardly even cells, as they lack DNA entirely. As for the mitochondria, why would they be "against" bacteria? They are the enslaved proletariat of the bacterial kingdom! When the revolution comes, eukaryotes will be screwed.