Question

In double fertilization, both of the sperm nuclei ______.

Options

• enter the embryo sac

• fertilize the egg cell

• fuse with the polar cell to produce the triploid endosperm

• are produced by the tube nucleus, and enter the ovule through the micropyle

Answer 1

In double fertilization, both of the sperm nuclei enter the embryo sac.

Explanation:

In double fertilization, both sperm nuclei enter the embryo sac; one fertilizes the egg to form the diploid zygote, and the other fuses with the two polar nuclei to form the triploid primary endosperm nucleus. This unique process ensures the formation of both embryo and endosperm in angiosperms.