The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
Evolutionary changes in flower structure
Structure of the Moon
Structure of the hepatitis B virus.
Comparing the structure of a primary shoot from (A) a monocot and (b) a eudicot.