Double fertilization in an Angiosperm.
   After  reaching  the  ovule  via  the pollen tube, two sperm enter the
   female gametophyte (embryo sac).
   One  sperm  fertilizes an egg to form a zygote, the other fuses with 2
   nuclei of a central cell to form a triploid endosperm.
   Review:  <A ClAsS=MID Href="../../../med/Vid/Campbell7e/ch38/38_06PlantFertilization_A.swf" oNClick="popurlt('../../../../med/Vid/Campbell7e/ch38/38_06PlantFertilization_A.swf');txtcolor('double_fertilization1','gray');return false;" Id=double_fertilization1><iMg sRc="/images/shockwave.gif" aLt='' boRDer=0></A>