Largest cell in embryo sac

Options

A. Has two polar nuclei
B. Contributes precursor of triple fusion and generative fertilization both
C. Also consists synergids at chalazal end
D. Is involved in syngamy

Answer

**Step-by-Step Solution:**

1. **Identify the Embryo Sac Structure**: The embryo sac is a crucial structure in flowering plants, which contains several types of cells, including the central cell, egg cell, synergids, and antipodal cells.

2. **Determine the Largest Cell**: Among these cells, the central cell is identified as the largest cell in the embryo sac. This cell is located in the center of the embryo sac.

3. **Characteristics of the Central Cell**: The central cell is characterized by its highly vacuolated cytoplasm, which means it contains a large number of vacuoles. This vacuolation is significant because it contributes to the cell's size and storage capabilities.

4. **Presence of Polar Nuclei**: Within the central cell, there are two polar nuclei. These nuclei are essential for the fertilization process in flowering plants.

5. **Function of Polar Nuclei**: The two polar nuclei can fuse to form a diploid secondary nucleus, which plays a role in the fertilization process. This fusion is part of the process known as triple fusion, which is crucial for the formation of the endosperm.

6. **Conclusion**: Therefore, the largest cell in the embryo sac is the central cell, which contains two polar nuclei and is involved in the fertilization process.

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