Answer:
C. facilitates the absorption of vitamin B12.
Explanation:
The Intrinsic factor is a substance that is produced by the stomach and it has the important function of producing vitamin B12 which is necessary for life. Vitamin B12 is used in the production of mature red blood cells. It also improves the function of the nervous system. The production of this intrinsic factor is a very vital role of the stomach because, in the absence of a stomach, for example, in the case of a gastrectomy, a person can only survive if he is given injections of Vitamin B12.
The stomach also serves as a holding center for food and eventually delivers the food to the small intestine and the duodenum.
The environment can influence the evolutionary changes so that the organism will be best suited to survive in that area. Genes that are useless in that specific environment will eventually be replaced with more useful traits as the species evolves.
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Answer:
They feed on blood cells and cause a disease called schistosomiasis. The symptoms vary, depending on which parts of the body the worms inhabit, but can include fever, abdominal pain, coughing, diarrhea, and enlargement of the liver and spleen.
Explanation:
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The most famous cancer cells are called HeLa cells. They're named HeLa cells after the young woman whose cervical cancer cells were biopsied to create this immortal line of cells: Henrietta Lacks. Her cells are still used to today in cancer research.
Side note: Her cells were used WITHOUT her consent and without any type of compensation for her contribution. Her case has been a big source of debate in the biomedical ethics community about consent and racial disparities in healthcare.
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