Question

One nucleus of the pollen tube and the secondary nucleus of the ovum grow into_______.

• A. endosperm
• B. anther
• C. stamen
• D. stigma

Answer 1

The correct option is A endosperm

Endosperm is formed when the two sperm nuclei inside a pollen grain reach the interior of a female gametophyte (sometimes known as the embryo sac). One male nucleus fuses with the egg cell to form a zygote ($\text{2n}$) and another male nucleus fuses with the secondary nucleus of the central cell, resulting in endosperm ($\text{2n}$) formation.