Answer:
hope this helps some
Explanation:
The theory that explains how this could have happened is called endosymbiotic theory. An endosymbiont is one organism that lives inside of another one. All eukaryotic cells, like your own, are creatures that are made up of the parts of other creatures. Mitochondria, the important energy generators of our cells, evolved from free-living cells.
Small intestines. <span>Although some </span>digestion<span> begins in the stomach, </span>most digestion<span> and absorption </span>take place<span> in the small intestine. The purpose of the small intestine is to finish </span>digestion<span> and absorb nutrient.</span>
A positive human impact on the environment occurs when a person takes action to improve society, nature and its resources.<span> Acting positively, even in a small manner, has a major impact on the environment, especially when it is done consistently.
</span>Humans can effect<span> the </span>ecosystem<span> in a </span>negative<span> way ,by pollution, waste dumping</span><span>, over hunting of animals,over fishing,industrial gases,energy ...</span><span>
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1. Proteins are denatured which makes it impossible for them to duplicate. (Proteins, are found in DNA)
2. Differing microbial organisms have different niches.
Acidophiles= acid loving,
Thermophiles= heat loving, etc.
Does that answer you question?
