Synergids of the polygonum type embryo sac are

Options

A. Hexaploid
B. Haploid
C. Diploid
D. Triploid.

Answer

To solve the question regarding the nature of the synergids in the polygonum type embryo sac, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Polygonum Type Embryo Sac**:
- The polygonum type embryo sac is characterized by having seven cells and eight nuclei. It is a common type of embryo sac found in many flowering plants.

2. **Identifying the Components of the Embryo Sac**:
- In the polygonum type embryo sac, there are three synergids, one egg cell, three antipodal cells, and one central cell. The central cell contains two polar nuclei.

3. **Location of Synergids**:
- The synergids are located at the micropilar end of the embryo sac. They play a crucial role in guiding the pollen tube to the egg cell during fertilization.

4. **Determining the Ploidy of Synergids**:
- The synergids, along with the egg cell and antipodal cells, are haploid (n). The central cell, which has two polar nuclei, is diploid (2n).

5. **Conclusion**:
- Since the question asks about the nature of the synergids in the polygonum type embryo sac, we conclude that the synergids are haploid (n).

### Final Answer:
The synergids of the polygonum type embryo sac are haploid (n).

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