Which is more common

Options

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

Answer

To determine which type of fertilization is more common among mesogamy, orogamy, chelazogamy, and afrogamy, we can analyze the definitions and characteristics of each type:

1. **Understanding the Types of Fertilization**:
- **Mesogamy**: This occurs when the pollen tube enters through the integument of the ovule.
- **Porogamy**: This is when the pollen tube enters through the micropylar end of the ovule.
- **Chalazogamy**: This type occurs when the pollen tube enters through the chalazal tissue at the chalazal end.
- **Orogamy**: This type is less commonly referenced and does not have a standard definition in the context of pollen tube entry.

2. **Identifying the Most Common Type**:
- Among these types, it is important to note that **porogamy** is recognized as the most common method of fertilization in flowering plants. This is because the micropylar end is typically more accessible for pollen tubes, facilitating successful fertilization.

3. **Conclusion**:
- Based on the definitions and common occurrences of these types, the answer to the question "Which is more common?" is **Porogamy**.