Question

on 14:
if bacteria is useful or harmful​

Answer 1

Answer:

Bacteria is the most useful microorganism in the environment and beneficial for human beings. But it also has some harmful effects on human body... The planet earth is full of bacteria and they play an important role in the different functions whether they are related to humans, animals or plants. All the bacteria are unicellular.

Answer 2

Answer:

some bacteria is useful and some are harmful like lactobalicuss found in curd dosen't harm it digest the food but some bacteria like campylobacter harm the body