Question

how did the bacteria effect the human
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Answer 1

Answer:

Sometimes bacteria multiply so rapidly they crowd out host tissues and disrupt normal function. Sometimes they kill cells and tissues outright. Sometimes they make toxins that can paralyze, destroy cells' metabolic machinery, or precipitate a massive immune reaction that is itself toxic.

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Answer 2

Answer:

These bacteria, or gut flora, influence health in many ways, from helping to extract energy from food to building the body's immune system, to protecting against infection with harmful, disease-causing bacteria.