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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

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Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

An example of a homeostatically controlled variable: blood levels of glucose in a human. An example of a homeostatically controlled variable: blood levels of glucose in a human.
Insulin, glucagon, and blood glucose Insulin, glucagon, and blood glucose
Water amount needed to grow crops Water amount needed to grow crops
Dread Scott. What Is the Proper Way to Display a U.S. Flag? Dread Scott. What Is the Proper Way to Display a U.S. Flag?
Causes of Error in Blood Pressure Readings Causes of Error in Blood Pressure Readings
Equipment and supplies needed for manual exfoliation using natural substances. Equipment and supplies needed for manual exfoliation using natural substances.
Video: Natural Selection, Species Isolation and Real World Example

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