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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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Medication errors are three times higher among children and infants than with adults.

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If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

The experiment of Plaxton and his colleagues demonstrated that plants can alter their metabolism in The experiment of Plaxton and his colleagues demonstrated that plants can alter their metabolism in
The Meselson-Stahl Experiment p1 The Meselson-Stahl Experiment p1
A downward-sloping spark line usually indicates high secondary ignition system resistance or an ... A downward-sloping spark line usually indicates high secondary ignition system resistance or an ...
Gently squeeze the tissues along the eyebrow line between your thumb and forefinger. Begin at the ... Gently squeeze the tissues along the eyebrow line between your thumb and forefinger. Begin at the ...
How to find the equation of a line that is parallel to a line passing through a point How to find the equation of a line that is parallel to a line passing through a point
Frederick Griffith’s experiment identifying a ″transformation factor″ responsible for heredity Frederick Griffith’s experiment identifying a ″transformation factor″ responsible for heredity
Video: Embryonic development - Week 3

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