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

Question

Quizplus · Accepted Answer

Double fertilisation is a unique process in plants where one sperm nucleus fertilises the egg cell to form the zygote, and the other sperm nucleus fuses with the two polar nuclei to form the endosperm. This results in the formation of a diploid zygote and a triploid endosperm, which provides nutrients to the developing embryo. Thus, option B - one sperm is needed to fertilise the egg, and a second sperm is needed to fertilise the polar nuclei is the correct option. The other options are incorrect as flowers do not need to be pollinated twice for double fertilisation to occur, the egg of the embryo sac is haploid and not diploid, and every sperm does not have two nuclei.

Double Fertilisation Means That ________