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Author Question: Which two groups of protists produce hard, mineralized skeletal structures or cell walls that ... (Read 54 times) |
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The longest a person has survived after a heart transplant is 24 years.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.