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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.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
Experiment of Lederberg and Tatum demonstrating gene transfer in E. coli
Injecting an IV push (bolus) medication; B, into a primary infusion line
Faces in experiment
A downward-sloping spark line usually indicates high secondary ignition system resistance or an ...
How to find the midpoint of a line segment
Waiting in line for a photocopier