Although the two are vastly different from each other.
They still bear some common characters, on the basis of
which they are introduced in Eubacteria of

kingdom-Monera.
These characters are as follows
(i) Both the groups do not possess well-defined nucleus.
(ii) Nucleus lacks nucleous and nuclear membrane.
(iii) DNA (genetic material) lies freely in the cytoplasm.
(iv) They possess 70 S type of ribosomes.