How many layers are present in the cell envelope of a bacterium?

Assertion $A$: Prokaryotic organisms do not undergo development and differentiation into multicellular forms.
Reason $R$: Prokaryotic organisms are unicellular.
Which option is correct for Assertion $A$ and Reason $R$?

What is the region in a prokaryotic cell where $DNA$ is located called?

The elongated tubular structures extending from the surface of bacteria are known as:

The prokaryotic genetic system contains . . . . . . .

In $Escherichia$ $coli$,which of the following is true?