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Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Derived traits Derived traits
Evolutionary tree derived from amino acid sequence comparisons Evolutionary tree derived from amino acid sequence comparisons
Selected Members of the Classes of Neurotransmitters Selected Members of the Classes of Neurotransmitters
Drug Classes for Hypertension Drug Classes for Hypertension
AP Classes AP Classes
#38.Genetically identical organisms derived from a single genetic source are #39 #38.Genetically identical organisms derived from a single genetic source are #39
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