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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

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People about to have surgery must tell their health care providers about all supplements they take.

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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

DNA molecules replicate to form identical chromatids DNA molecules replicate to form identical chromatids
Proportions of the genetic and physical maps are similar but not identical Proportions of the genetic and physical maps are similar but not identical
Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania) Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania)
In a project on job discrimination, Pager prepared identical résumés for the teams, but with one ... In a project on job discrimination, Pager prepared identical résumés for the teams, but with one ...
Identical Twin Normal Birth Position Identical Twin Normal Birth Position
1.6 Organisms are made up of cells, each of which contains an identical set of genes. 1.6 Organisms are made up of cells, each of which contains an identical set of genes.
Video: Mechanism of enzyme action

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