Question

full deffination of bacteria deeply explain

Answer 1

Bacteria are single-celled microorganisms with prokaryotic cells, which are single cells that do not have organelles or a true nucleus and are less complex than eukaryotic cells. Bacteria with a capital B refers to the domain Bacteria, one of the three domains of life. The other two domains of life are Archaea, members of which are also single-celled organisms with prokaryotic cells, and Eukaryota. Bacteria are extremely numerous, and the total biomass of bacteria on Earth is more than all plants and animals combined.

Answer 2

A member of a large group of unicellular microorganisms . It has cell wall but lack of organelles and an organized nucleus with some diseases . It can be dangerous when cause infection.
Different types of bacteria are -
cocci ,spirilla ,Bacilli.