In angiosperms,Number of nuclei and the cells taking part in double fertilization is

Options

A. 5,5
B. 3,4
C. 5,4
D. 2,2

Explanation

To solve the question regarding the number of nuclei and cells involved in double fertilization in angiosperms, we can break down the process into clear steps:

### Step-by-Step Solution:

1. **Understanding Double Fertilization**:
- In angiosperms, double fertilization involves two distinct fertilization events: syngamy and triple fusion.

2. **Syngamy**:
- In syngamy, one male gamete (sperm) fuses with the female gamete (egg cell).
- The male gamete contributes one nucleus, and the egg cell also contains one nucleus.
- Therefore, in this step, there are **2 nuclei** (1 from the male gamete and 1 from the egg) and **2 cells** (1 male gamete and 1 egg cell).

3. **Triple Fusion**:
- The second male gamete from the pollen grain (which contains two male gametes) fuses with the central cell.
- The central cell is a binucleated cell, meaning it has **2 polar nuclei**.
- Thus, during triple fusion, the second male gamete contributes **1 nucleus**, and the central cell contributes **2 nuclei**.
- This results in a total of **3 nuclei** involved in triple fusion (1 from the male gamete and 2 from the central cell) and **1 cell** (the central cell).

4. **Total Count**:
- Now, we can add up the total number of nuclei and cells involved in double fertilization:
- From syngamy: 2 nuclei and 2 cells.
- From triple fusion: 3 nuclei and 1 cell.
- Therefore, the total number of nuclei = 2 (from syngamy) + 3 (from triple fusion) = **5 nuclei**.
- The total number of cells = 2 (from syngamy) + 1 (from triple fusion) = **3 cells**.

5. **Final Answer**:
- In total, during double fertilization in angiosperms, there are **5 nuclei** and **3 cells** involved.