NEET BIOLOGY

Detailed explanation-1: -Not all bacteria are harmful, and some bacteria that live in your body are helpful. For instance, Lactobacillus acidophilus-a harmless bacterium that resides in your intestines-helps you digest food, destroys some disease-causing organisms and provides nutrients.

Detailed explanation-2: -The human body is full of bacteria, and in fact is estimated to contain more bacterial cells than human cells. Most bacteria in the body are harmless, and some are even helpful. A relatively small number of species cause disease.

Detailed explanation-3: -The Difference Between Good and Bad Bacteria The gut stores both “good” bacteria and “bad” bacteria. As the name suggests, good bacteria in the body are bacteria that are known to have a positive impact on health. Bad bacteria can exist in human bodies at low levels without causing much harm.

Detailed explanation-4: -Bad Bacteria–Only a small handful of bacteria are harmful and capable of causing disease. These are called pathogenic.To cause disease, these pathogenic bacteria invade a living organism due to poor hygiene, unsanitary water, and poor sewage treatment centers.