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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Three routes of tissue-level transport in plants: transmembrane, symplastic, and apoplastic. Three routes of tissue-level transport in plants: transmembrane, symplastic, and apoplastic.
Plants Plants
Plants Plants
The Functions of Water in the Body The Functions of Water in the Body
Water-Reactive Salts Water-Reactive Salts
Offspring of crosses involving leaves from various branches of variegated Offspring of crosses involving leaves from various branches of variegated
Video: Stimulus (introduction)

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