In angiosperms endosperm is formed by

Options

A. Division of fused polar nuclei
B. Free nuclear division of megaspore
C. Division of fused synergids and male gamete
D. Division of fused polar nuclei and male gamete.

Answer

**Step-by-Step Solution:**

1. **Understanding Angiosperms**: Angiosperms are flowering plants that undergo a unique process known as double fertilization.

2. **Double Fertilization**: This process involves the release of two male gametes from the pollen grain into the embryo sac via the pollen tube.

3. **First Male Gamete**: One of the male gametes fuses with the egg cell, a process known as syngamy, resulting in the formation of a zygote.

4. **Second Male Gamete**: The second male gamete migrates towards the two polar nuclei (also referred to as the secondary nucleus) in the embryo sac.

5. **Triple Fusion**: The fusion of the second male gamete with the polar nuclei is called triple fusion, which results in the formation of a triploid primary endosperm mother cell.

6. **Formation of Endosperm**: The primary endosperm mother cell undergoes mitotic divisions to develop into the endosperm, which serves as a food reserve for the developing embryo.

7. **Conclusion**: Therefore, in angiosperms, the endosperm is formed by the division of the fused polar nuclei and the male gamete.

**Final Answer**: The endosperm in angiosperms is formed by the division of the fused polar nuclei and the male gamete.

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