The non-nucleated,unicellular organisms of Whittaker's $(1969)$ classification are included in the kingdom

Bacteria are included in which of the following kingdoms?

Bacteria are considered primitive organisms because they

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.

Organisms that obtain energy by the oxidation of reduced inorganic compounds are called .....

Cyanobacteria are