20 40 60
Displaying 1 - 1 out of 1 Object(s)
Term Definition
Polar nuclei Two nuclei that migrate to the center of the embryo sac and fuse with a male nucleus (sperm) to form the primary endosperm nucleus which divides and sometimes forms the endosperm. A mature megagametophyte of an angiosperm. Drawing by M. Sashital.