[Campbell Biology P.890] Double fertilization in angiosperms means that: | Practice Question

Double fertilization in angiosperms 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: every sperm has two nuclei.

Explanation

In angiosperms, double fertilization is a unique process where one sperm cell fertilizes the egg cell to form the diploid zygote which develops into the embryo , and the other sperm cell fuses with two polar nuclei to form the triploid endosperm which provides nourishment to the embryo .