Abu usman umer al jahiz

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       Muslim scientist between 8th and 15th century made outstanding contributions for the progress of biology and medicine. Many Muslim scientist made importing contribution in the biological field. The most important of Al-Jahiz's works is the Book of Animals - Kitab al Hayawan which, even incomplete, totals seven comprehensive volumes in the printed edition. It contains important scientific information and anticipates a number of concepts that were not fully developed until the first half of the twentieth century. In the book, Al Jahiz discusses animal mimicry nothing that certain parasites adapt to color of their host - and writes at length on the influences of climate and diet on men, and plants and animals of different geographical regions. He discusses animal communication, psychology and the degree of intelligence of insect and animal species. He also gives a detailed account of the social organization of ants, including from his own observation, a description of how they store grain in their nests so that it does not spoil during the rainy season. He even knew that some insects are responsive to light  - and used this information to suggest a clever way of getting rid of mosquitoes and flies.

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