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Author Question: Graham is a new teacher who has been asked to participate in a district committee considering new ... (Read 168 times) |
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Your heart beats over 36 million times a year.
IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
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.