Question

In double fertilization, both of the sperm nuclei

• A. Enter the embryo sac
• B. Fertilize the egg cell
• C. Fuse with the polar cell to produce the triploid endosperm
• D. Are produced by the tube nucleus, and enter the ovule through the micropyle

Answer 1

The correct option is A Enter the embryo sac

Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm). It begins when a pollen grain adheres to the stigma of the carpel, the female reproductive structure of a flower. The pollen grain then takes in moisture and begins to germinate, forming a pollen tube that extends down toward the ovary through the style and opening in the ovule. The pollen tube proceeds to release the two sperm in the megagametophyte

So, the correct answer is 'enter the embryo sac'