There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Watson and Crick
Watson and Crick and their model of the DNA double helix
Watson's 10 Carative
Opener Bronze sculpture of the Watson–Crick model for double-helical DNA
The DNA double helix as proposed by Watson and Crick
James Watson and Francis Crick’s metal-and wire model of DNA