Answer: <span>Normal microbiota directly kill invading organisms.
Some bacteria that reside in our body are useful to combat pathogenic microorganisms. Those bacteria, like lactobacillus and E.coli, inhibit the growth of those pathogenic organisms by taking, for example, oxygen and nutrients from them, or even changing the local ph. They can also produce metabolites that make the environment impossible to live for the intruders.
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The correct answer is that bones do not have a role in glycogen production. Glycogen is only produced by two organs of the body; the muscles and the liver. Bones and bone structures function to support movement by serving as insertions for the muscles. The tissue inside the bone is called the bone marrow; which is divided into red marrow (functions for blood cell formation) and yellow marrow (functions to store fat).