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Illicit drug use costs the United States approximately $181 billion every year.

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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

Evolutionary adaptation to a new environment via natural selection. Evolutionary adaptation to a new environment via natural selection.
The three basic body plans of bilaterally symmetrical animals. The three basic body plans of bilaterally symmetrical animals.
There are multiple pathways for heat exchange between organisms and the environment. There are multiple pathways for heat exchange between organisms and the environment.
International Performance in Reading, Math, and Science, Eight Grade International Performance in Reading, Math, and Science, Eight Grade
Facility Emergency Response Plans. Courtesy of Chris Weber, Dr. Hazmat, Inc. Facility Emergency Response Plans. Courtesy of Chris Weber, Dr. Hazmat, Inc.
Producer acquiring energy and nutrients from the environment Producer acquiring energy and nutrients from the environment
Video: Secondary Active Transport

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