In majority of the flowering plants, entry of pollen tube in ovule is

Options

A. Porogamy
B. Chalazogamy
C. Mesogamy
D. Basogamy

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the method by which the pollen tube enters the ovule in the majority of flowering plants.

2. **Identifying the Options**: The options given are:
- Porogamy
- Chalazogamy
- Mesogamy
- Basogamy

3. **Defining the Terms**:
- **Porogamy**: This is the process where the pollen tube enters the ovule through the micropyle. It is the most common method observed in flowering plants (angiosperms).
- **Chalazogamy**: In this method, the pollen tube enters through the chalazal end of the ovule. This is less common and is seen in specific plants like Casuarina.
- **Mesogamy**: This refers to the entry of the pollen tube through the integuments of the ovule. It is observed in plants like Cucurbita and through the funiculus in Stachya.
- **Basogamy**: This term is not commonly used in the context of pollen tube entry and is not relevant to the majority of flowering plants.

4. **Analyzing the Methods**:
- Since porogamy involves the entry through the micropyle and is the most prevalent method in angiosperms, it is essential to recognize that this is the standard route for pollen tube entry in most flowering plants.

5. **Conclusion**: Based on the definitions and prevalence of the methods, the correct answer to the question is **Porogamy**.

### Final Answer:
**Porogamy** is the method by which the pollen tube enters the ovule in the majority of flowering plants.

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