Question

Q . what is bacteria ?​

Answer 1

Explanation:

Bacteria are small single-celled organisms. Bacteria are found almost everywhere on Earth and are vital to the planet's ecosystems. Some species can live under extreme conditions of temperature and pressure. The human body is full of bacteria, and in fact is estimated to contain more bacterial cells than human cells.

Answer 2

Bacteria

• Bacteria are unicellular prokaryotic microorganisms.
• Some bacteria are useful for humans while some can be harmful.
• They are of four major types: Bacillus, Vibrio, Cocci and Spirilla.

hope it helps .