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

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

A number of tree species can be interconnected by mycorrhizal fungi in the forests of British Columb A number of tree species can be interconnected by mycorrhizal fungi in the forests of British Columb
Human Biology Human Biology
The traditional human karyotypes derived from a normal female and a normal male The traditional human karyotypes derived from a normal female and a normal male
Occurrence of Barr bodies in various human karyotypes Occurrence of Barr bodies in various human karyotypes
Taste receptors in the human tongue Taste receptors in the human tongue
The distribution of Neandertal and Denisovan DNA in the modern human genome The distribution of Neandertal and Denisovan DNA in the modern human genome
Video: Factors that influence muscle tension - Sarcomere length and force, understretched and overstretched

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