There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
The U.S. Social Class Ladder
Student Raises Hand in Class
Another class of dihydrofolate reductase inhibitors is exemplified by trimethoprim