Heterocysts are found in certain

Heterocysts present in $Anabaena$ are specialised for:

In the bacterium $Bacillus$ $subtilis$,the cells often become attached from end to end forming long filamentous chains,which are embedded in a mass of mucilage forming a scum layer on the substratum. This is called:

The nuclear membrane is absent in .....

The cells of cyanobacteria and bacteria exhibit similarity in having

Which of the following domains lacks a cell wall?