Explanation:

- Nucellus: The nucellus is part of the ovule. It is mostly diploid, meaning it has two sets of chromosomes and not haploid. It provides nourishment to the developing embryo sac.

- Synergid: These are haploid cells located near the egg cell in the ovule. They help guide the pollen tube to the egg.

- Egg: The egg cell is haploid. It fuses with a sperm cell to form a zygote during fertilization.

- Antipodal: These are haploid cells located opposite the egg and synergids in the ovule. They are part of the embryo sac.

The correct answer is: Nucellus