The process in which viruses are involved in sexual reproduction of bacteria is called

Some hyperthermophilic organisms that grow in highly acidic $(pH \ 2)$ habitats belong to the two groups:

Which of the following is a common characteristic shared by both methanogens and halophiles?

Refer to the given figures of a bacterial cell and Nostoc and choose the option which shows the correct labels for the structures marked as $A$,$B$,$C$,$D$,and $E$.

Spirochetes are .......

If an organism is placed in the Kingdom $Monera$,the organism ...