Pollination and Fertilization pollination --transfer of pollens from anther to stigma fertilization --union of sperm and egg double fertilization --union of sperm and egg to form zygote, plus union of sperm and two polar nuclei to form endosperm 1.
(union of sperm and two polar nuclei; to form; endosperm 1)
union of sperm and two polar nuclei
to form
endosperm 1