In the typical embryo sac, the nuclei are arranged as

Options

A. `3+2+3`
B. `3+3+2`
C. `2+3+3`
D. `2+4+2`

Answer

To answer the question about the arrangement of nuclei in a typical embryo sac, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Embryo Sac**:
- The embryo sac is a structure found in angiosperms (flowering plants) that contains the female gametes.
- It has two ends: the chalazal end and the micropilar end.

2. **Identifying the Components**:
- At the **chalazal end**, there are **three antipodal cells**.
- At the **micropilar end**, there are **three cells**: **two synergids** and **one egg cell**.
- In the center of the embryo sac, there is a **central cell** which contains **two polar nuclei**.

3. **Counting the Nuclei**:
- Antipodal cells: 3 nuclei
- Synergids: 2 nuclei
- Egg cell: 1 nucleus
- Polar nuclei in the central cell: 2 nuclei
- Total nuclei = 3 (antipodals) + 2 (synergids) + 1 (egg) + 2 (polar) = **8 nuclei**.

4. **Arranging the Nuclei**:
- The arrangement can be summarized as:
- 3 antipodal cells
- 2 polar nuclei
- 3 cells at the micropilar end (2 synergids + 1 egg cell)
- Thus, the arrangement of nuclei can be expressed as **3 + 2 + 3**.

5. **Choosing the Correct Option**:
- Based on the arrangement, the correct option is **3 + 2 + 3**.

### Final Answer:
The nuclei in a typical embryo sac are arranged as **3 antipodal cells, 2 polar nuclei, and 3 cells at the micropilar end (2 synergids + 1 egg cell)**, making the total arrangement **3 + 2 + 3**.

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