How do you draw a punnett square in microsoft word?

All ova contain sex chromosomes corresponding to: x y xx xy

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?

Define adaptation. why do organisms adapt? give an example.