Cyanobacteria are

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:

Most living organisms cannot survive at temperatures above $45\,^{\circ}C$. How are some microbes able to live in habitats with temperatures exceeding $100\,^{\circ}C$?

Mycoplasma can live successfully in the phloem due to being:

An akinete is a structure associated with ........

In $Nostoc$,the heterocysts are: