We know of at least one eukaryote species that lost its mitochondria. I don’t know about mitochondria but no nucleus. Erythrocytes don’t have either, so maybe (speculating here) there are some specialized animal cells that have mitochondria but no nuclei.
We know of at least one eukaryote species that lost its mitochondria. I don’t know about mitochondria but no nucleus. Erythrocytes don’t have either, so maybe (speculating here) there are some specialized animal cells that have mitochondria but no nuclei.