Electron microscopic observations reveal that the cells of ........ lack membrane-bound organelles.

Organisms called methanogens are most abundant in a

Blebs can be noted in

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

Polluted water bodies usually have a very high abundance of plants like $Nostoc$ and $Oscillatoria$. Give reasons.

The cell wall of halophilic bacteria is $NOT$ made up of which of the following?