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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Experimental Apparatus Glass Distillation Column Experimental Apparatus Glass Distillation Column
Stretch the extensor muscles with flexion at the wrist. Reposition the palm to face the table. Apply ... Stretch the extensor muscles with flexion at the wrist. Reposition the palm to face the table. Apply ...
Stretch anterior tissues by pressing down on shoulders. Stand at the head of the table. Place the ... Stretch anterior tissues by pressing down on shoulders. Stand at the head of the table. Place the ...
Apply knee to chest stretch for posterior hip and leg muscles. Facing the table directly, place one ... Apply knee to chest stretch for posterior hip and leg muscles. Facing the table directly, place one ...
DOT placarding requirements: Table 1 materials must be placarded in any quantity, and Table 2 ... DOT placarding requirements: Table 1 materials must be placarded in any quantity, and Table 2 ...
The periodic table and its creator, Dmitry Mendeleyev. The periodic table and its creator, Dmitry Mendeleyev.
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