Cell division in blue-green algae is more or less similar to that in

Organisms which have cells but no distinct nucleus are known as:

Assertion $A$: Some bacteria are motile.
Reason $R$: Some bacteria have tubular pili or fimbriae extensions arising from their surface.
Which option is correct for Assertion $A$ and Reason $R$?

Bacteria that take up the Gram stain are called . . . . . . and those that do not take up the Gram stain are called . . . . . . .

There is no alternation of generation in $Escherichia$ $coli$ because there is no

Which of the following important features are found in blue-green algae?