Organ, in biology, a group of tissues in a living organism that have been adapted to perform a specific function. In higher animals, organs are grouped into organ systems; e.g., the esophagus, stomach, and liver are organs of the digestive system.
<span>The reactivity of the elements depends on the number of electrons in the outermost shell and the distance of outermost shell depends on the influence of the nucleus.........</span>
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Deforestation is both the removal of trees and the permanent retasking of the land for non-forestry purposes. Therefore, since tree roots help aerate soil and improve soil water retention, this permanent removal of trees reduces the amount of water that soil can absorb and increases the amount that will perforce flow over the ground as runoff. Increased surface runoff leads to flooding.
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