Double fertilization means that
A) flowers must be pollinated twice to yield fruits and seeds.
B) every egg must receive two sperm to produce an embryo.
C) one sperm is needed to fertilize the egg, and a second sperm is needed to fertilize the polar nuclei.
D) the egg of the embryo sac is diploid.
E) every sperm has two nuclei.

Question

Quizplus · Accepted Answer

Double fertilization is a unique process in angiosperms where one sperm from the pollen tube fuses with the egg to form a zygote (which develops into an embryo), and the other sperm fuses with the polar nuclei to form endosperm (which provides nourishment to the embryo). Thus, C is the correct choice where one sperm is needed to fertilize the egg, and a second sperm is needed to fertilize the polar nuclei.

Double Fertilization Means That