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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

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Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

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

Feeding groove and phagocytosis displayed by many species of supergroup Excavata. Feeding groove and phagocytosis displayed by many species of supergroup Excavata.
Olfactory structures in the human nose. Olfactory structures in the human nose.
Human Sperm greatly enlarged Human Sperm greatly enlarged
The MMPI personality inventory The MMPI personality inventory
Sensory Differences Between Species Sensory Differences Between Species
Comparison between human chromosome 21 and chimpanzee chromosome 22 Comparison between human chromosome 21 and chimpanzee chromosome 22
Video: Evolutionary tree of life Animation

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