Pollination - Pollination

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Pollination Pollination is the mechanical transfer of pollen grains from an anther to a  stigma , the receptive end  of a carpel. Pollination is accomplished by a variety of physical dispersal agents such as wind, water,  and gravity or many kinds of animals including insects, bats, birds, and small rodents. The variations  in floral structure are, in large part, adaptations to achieve pollination success. Most pollination is  between flowers located on separate plants (  cross-pollination ), but in some taxa  self-pollination  occurs when pollen from the anthers falls on stigmas of the same plant.  Fertilization If the pollen grain lands on the stigma of a genetically compatible flower, it absorbs moisture and a  pollen tube  emerges through a pore in the wall. The germinated pollen grain with its pollen tube and  three nuclei is the 
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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