Endosperm of flowering plants develops from

Options

A. Haploid nucleus
B. Diploid nucleus
C. Triploid nucleus
D. Tetraploid nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the origin of the endosperm in flowering plants. The endosperm is a tissue that provides nourishment to the developing embryo.

2. **Identifying the Process**: In flowering plants (angiosperms), the process of double fertilization occurs. This is a unique feature of angiosperms.

3. **Double Fertilization**: During double fertilization, two male gametes (sperms) are released from the pollen tube into the embryo sac.

4. **Formation of the Zygote**: One of the male gametes fuses with the female gamete (egg cell), which is a haploid structure. This fusion is called syngamy and results in the formation of a diploid zygote, which later develops into the embryo.

5. **Formation of the Endosperm**: The second male gamete fuses with the secondary nucleus (which is formed by the fusion of two polar nuclei). This secondary nucleus is diploid. The fusion of the haploid male gamete with the diploid secondary nucleus results in the formation of the primary endosperm nucleus, which is triploid.

6. **Conclusion**: Therefore, the endosperm of flowering plants develops from the triploid nucleus formed during the process of double fertilization.

7. **Final Answer**: The endosperm of flowering plants develops from the triploid nucleus.

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