e.coli and septic tank
it depends on the type of the bacteria. also beneficial bacterias outnumber the population of harmful bacterias.
In your body
There are different types. Some are, some arent
yes, if it is not pasteurized first to kill the bacterias.
it leads to soil pollution if used excess and it also kills helpful bacterias
Non harmful bacteria are referred to as commensal bacteria. These bacteria coexist peacefully with the host organism and do not cause any harm or disease.
Worms and yeast most fungi
Plants, fungi, and most bacterias.
There are both helpful and harmful bacterias.Harmful bacterias can:Cause infections and diseasesSpoil foodsCreate bad smells
Self purification of water: Water contains lots of soluble minerals,bacterias&various metal ions. Bacteriophages(combination of bacterias&viruses) are responsible for self purification of water.They are also present in river GANGA.They attack harmful bacterias and kill them by making holes in their membranes(also called as lysis).
The cellulose makes the cell wall harder to protect it from bacterias and other harmful virus.
Yes. Most single-celled organisms are bacterias, which are prokaryotic.