Question

Bacteria are both harmful and useful. Justify the statement by giving two ways
how they are useful and two ways how they are harmful.
.
.
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Answer 1

Answer:

According to research published in the journal Best Practice & Research Clinical Gastroenterology , beneficial bacteria may also protect us against their dangerous relatives that cause disease by crowding them out in the gut, producing acids that inhibit their growth, and stimulating the immune system to fight them off ...