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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Answer:
The blood circulatory system delivers nutrients and oxygen.
Explanation:
Answer:
the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
Explanation:
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The answer is mitochondria because mitochondria is involved in cellular respiration.
The amount of available resources in the ecosystem must change at a predictable rate.
