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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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

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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Experiment of Lederberg and Tatum demonstrating gene transfer in E. coli. Experiment of Lederberg and Tatum demonstrating gene transfer in E. coli.
Experiment on newt embryos that led to the discovery of Spemann's organizer. Experiment on newt embryos that led to the discovery of Spemann's organizer.
Landbridge connections between continental Asia and Indonesia during glacial periods extend as far a Landbridge connections between continental Asia and Indonesia during glacial periods extend as far a
Perceptual judgment task used in Asch’s conformity studies Perceptual judgment task used in Asch’s conformity studies
Experimental Apparatus for Fluidization Experiment Experimental Apparatus for Fluidization Experiment
A group of children were asked how many hours a day they spend watching television. A group of children were asked how many hours a day they spend watching television.
Video: Passive Smoke Exposure

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