Double fertilization results in formation of

Options

A. Seed
B. Fruit
C. Megaspore mother cell
D. Endosperm.

Answer

**Step-by-Step Solution:**

1. **Understanding Double Fertilization**: Double fertilization is a unique process that occurs in angiosperms (flowering plants). It involves two male gametes (sperms) from the pollen grain entering the female gametophyte (embryo sac) through the pollen tube.

2. **First Fertilization Event**: One of the two sperm cells fuses with the egg cell (female gamete) to form a zygote. This zygote is diploid (2n) because it is formed by the fusion of two haploid (n) gametes.

3. **Development of the Zygote**: The zygote eventually develops into an embryo, which is also a diploid structure.

4. **Second Fertilization Event**: The second sperm cell fuses with the two polar nuclei present in the embryo sac, forming a triploid (3n) structure known as the primary endosperm nucleus.

5. **Formation of Endosperm**: The primary endosperm nucleus will later develop into the endosperm, which provides nourishment to the developing embryo within the seed.

6. **Conclusion**: Therefore, the outcome of double fertilization is the formation of endosperm, along with the zygote (which develops into the embryo). However, since the question specifically asks about what double fertilization results in, the correct answer is the endosperm.

**Final Answer**: Double fertilization results in the formation of endosperm.

---