Number of nuclei present in the mature male gametophyte of angisoperms is

Options

A. one
B. two
C. Three
D. Many.

Answer

To determine the number of nuclei present in the mature male gametophyte of angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Male Gametophyte**: The male gametophyte in angiosperms is commonly referred to as the pollen grain.

2. **Formation of Pollen Grain**: The pollen grain is formed from microspore mother cells through a process called microsporogenesis. During this process, the microspore mother cell undergoes meiosis to produce haploid microspores.

3. **Development of Microspores**: Each haploid microspore then develops into a pollen grain. This pollen grain is the mature male gametophyte.

4. **Nuclei in Pollen Grain**: Typically, a mature pollen grain contains two nuclei. One nucleus is referred to as the generative nucleus, which will eventually divide to form two sperm cells, and the other is the vegetative nucleus, which is involved in the growth of the pollen tube.

5. **Conclusion**: Therefore, the number of nuclei present in the mature male gametophyte of angiosperms is **two**.

### Final Answer:
The number of nuclei present in the mature male gametophyte of angiosperms is **2**.

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