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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
Cyanide works by making the human body unable to use oxygen.
An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.
![California ground squirrel (Spermophilus beecheyi) in the man-made rocky shoreline of the Berkeley M](https://biology-forums.com/gallery/47/medium_27692_23_04_12_3_42_52.jpeg)
![John Lewis Krimmel’s painting of the Fourth of July in Centre Square Philadelphia (1812) shows the d](https://biology-forums.com/gallery/47/medium_374628_16_08_15_9_59_55_222732435.jpeg)