Which of the cells in the Polygonum type of embryo sac which degenerate after fertilization

Options

A. antiploid
B. synergids
C. secondary nucleus
D. central cell

Answer

To answer the question regarding which cells in the Polygonum type of embryo sac degenerate after fertilization, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Polygonum Type of Embryo Sac**:
- The Polygonum type of embryo sac is the most common type found in flowering plants (angiosperms). It typically consists of 7 cells and 8 nuclei.

2. **Identify the Cells Present in the Polygonum Embryo Sac**:
- The 7 cells include:
- 3 Antipodal cells
- 1 Central cell (which contains the secondary nucleus)
- 2 Synergids
- 1 Egg cell

3. **Role of Each Cell in Fertilization**:
- The central cell (secondary nucleus) participates in the process of fertilization through a process called triple fusion.
- The egg cell is involved in the fertilization process as well.

4. **Determine Which Cells Degenerate**:
- After fertilization, the cells that do not participate in the fertilization process will degenerate.
- This includes:
- The 3 Antipodal cells
- The 2 Synergids

5. **Conclusion**:
- Therefore, the cells that degenerate after fertilization in the Polygonum type of embryo sac are the **Antipodal cells and Synergids**. The central cell and egg cell are the only ones involved in fertilization.

### Final Answer:
The cells that degenerate after fertilization in the Polygonum type of embryo sac are the **Antipodal cells and Synergids**.

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