Membranous extensions in blue-green algae are known as

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

Nostoc is a

Which kingdom do nitrogen-fixing organisms belong to?

In the cytoplasm of cyanobacteria, membrane-bound extensions are observed, which are called $.....$.

In bacteria,the most resistant stage is