Question

Useful and harmful bacteria short note​

Answer 1

Explanation: There are many types of bacteria. Some are useful and some are harmful. Useful ones include that make yoghurt/curd (Lactobacilli)and the ones that help bread rise (Yeast).

There are many harmful ones too, which make you sick. Im sorry i dont know any name of such type of bacteria

Answer 2

Answer:

useful bacteria

bacterias like nitrogenous bacteria and denitrogeneous bacterias are need for the cultivation of crops and growth of plants. there are certain bacteria like antibiotics helps us humans to cure bacterial diseases.

harmful bacterias

harmful bacteria are the bacterias that cause diseases especially infections . some certain bacterias spoil food materials.