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Inessa [10]
3 years ago
12

The condition known as heartburn is most often caused by acid regurgitating from the stomach into the esophagus. Why do you thin

k the acid tends to burn the esophagus and produce pain but does not similarly burn the stomach?
Biology
1 answer:
Talja [164]3 years ago
7 0
Because the stomach is lined by a mucous membrane (the gastric mucosa)
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Scientific investigations often lead to the formulation of new scientific questions. charle’s darwin reviewed his observations a
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Can evolution create new species over time through natural selection?

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<h3>Who was Charles Darwin ?</h3>
  • English scientist Charles Darwin gained notoriety for his theory of natural selection, which postulated that organisms in an ecosystem adapt and evolve in order to maintain their survival.
  • Because of this, Darwin was inspired to consider whether natural selection can eventually result in the emergence of new species after studying the selective breeding of pigeons.
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The ph of your stomach must be (a)more than 7 (b)basic (c)equal to 7 (d) none of the above
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Answer:

(d) None of the above

Explanation:

The pH of your stomach must be highly acidic, because the optimum pH for pepsin, the chief stomach enzyme, is 1.5.

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The endosymbiotic theory focuses on the origin of two eukaryotic organelles that have bacteria characteristics (mitochondria in animals and chloroplasts in plants). These two are s  are believed to have developed from symbiotic bacteria.

<span>In designing an experiment that would support the endosymbiotic theory, the statement that would provide the best evidence is comparing mitochondrial DNA between different eukaryotes to see how closely they are related.</span>

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Explanation:

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