The different cells of embryo sac are

Options

A. Central cell and antipodal cells
B. Antipodal cells and egg apparatus
C. Central cell and egg apparatus
D. Egg apparatus, central cell and antipodal cells.

Answer

To answer the question about the different cells of the embryo sac, we can break down the information step by step.

### Step-by-Step Solution:

1. **Understanding the Embryo Sac**:
The embryo sac is a structure found in the ovule of flowering plants. It is crucial for reproduction as it contains the female gametes.

2. **Cell Composition**:
A mature embryo sac typically consists of **seven cells** and **eight nuclei**. The arrangement of these cells is specific and plays a significant role in fertilization.

3. **Types of Cells**:
- **Synergids**: There are **two synergids**. These cells are located near the micropyle (the opening of the embryo sac) and help in guiding the pollen tube to the egg cell.
- **Egg Cell**: There is **one egg cell**. This is the female gamete that will fuse with the male gamete (sperm) during fertilization.
- **Central Cell**: There is **one central cell** which contains **two polar nuclei**. This cell is important for double fertilization, where one sperm fertilizes the egg cell and the other fuses with the polar nuclei to form the endosperm.
- **Antipodal Cells**: There are **three antipodal cells** located at the opposite end of the embryo sac. Their function is not entirely clear, but they are thought to play a role in the nutrition of the embryo sac.

4. **Summary of Cell Types**:
Therefore, the different cells of the embryo sac include:
- **2 Synergids**
- **1 Egg Cell**
- **1 Central Cell (with 2 polar nuclei)**
- **3 Antipodal Cells**

5. **Conclusion**:
The complete structure of the embryo sac consists of the egg apparatus (which includes the egg cell and synergids), the central cell, and the antipodal cells.

### Final Answer:
The different cells of the embryo sac are: **egg apparatus (2 synergids + 1 egg cell), central cell, and 3 antipodal cells**.

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