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.
</span>
During nitrification, ammonia is changed back into nitrate.
Nitrification is a three-step process of oxidation of ammonia. It is an aerobic process performed by small groups of autotrophic bacteria (Nitrosomonas, Nitrobacter). First step- ammonia to hydroxylamine, Second step-hydroxylamine to nitrite, Third step-nitrite to nitrate. Nitrification together with ammonification is part of a nitrogen cycle.
Answer: Down syndrome and cystic fibrosis
Weather condition , temperature , and food ability
<span>Diffusion and osmosis are important to cells because they don't require energy to transport very important molecules such as water and steroids.</span>
