Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Covalent Bonding Can Form Compounds
Amphipathic compounds in aqueous solution
Graph of 3 compounds tested
Chemical structures of ester and amide local anesthetics.
Compounds
Hydrolysis reactions for some biochemically important phosphate compounds (part 3)