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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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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).
A purse made from a cane toad.
Cleavage with trypsin and papain separates the myosin heads
Bolts and screws have many different heads. The head determines what tool is needed.
Models of Selective Attention in the Dichotic Listening Task
Mechanisms of active and passive immunity
canine heads