Double fertilization occurs when
a. one sperm unites with an egg and another sperm unites with the central cell of the female gametophyte.
b. two sperm unite with one egg.
c. two sperm unite with the central cell.
d. one sperm unites with the egg and another sperm unites with the male gametophyte.
e. one sperm unites with the egg and another sperm unites with a pollen grain.
A
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