Some microorganisms grow and multiply at temperatures of $100-105^{\circ}C$. They are included in:

Which of the following is a characteristic of the domain $Archaea$?

$......$ bacteria oxidise various inorganic substances such as nitrites,ammonia and use the released energy for $\text{ATP}$ production $:-$

Bacteria are considered as plants,because

Choose the correct statements $(i - iv)$ regarding mycoplasma:
$(i)$ Mycoplasma has no cell wall.
$(ii)$ Mycoplasma is the smallest living organism known.
$(iii)$ Mycoplasma cannot survive without $O_2$.
$(iv)$ Mycoplasma are pathogenic in animals and plants.

Some hyperthermophilic organisms that grow in highly acidic habitats are divided into two groups,which are called: