Geitonogamy involves

Options

A. Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.
B. Fertilization of a flower by the pollen from another flower of the same plant.
C. Fertilization of a flower by the pollen from the same flower.
D. Fertilization of a flower by the pollen from a flower of another plant in the same population

Answer

To answer the question "Geitonogamy involves", we need to analyze the options provided and determine which one accurately describes the process of geitonogamy.

### Step-by-Step Solution:

1. **Understanding Geitonogamy**:
- Geitonogamy is a form of pollination where pollen from one flower fertilizes another flower on the same plant. It is a type of cross-pollination.

2. **Reviewing the Options**:
- **Option A**: Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.
- **Option B**: Fertilization of a flower by the pollen from another flower of the same plant.
- **Option C**: Fertilization of a flower by the pollen from the same flower.
- **Option D**: Fertilization of a flower by the pollen from a flower of another plant in the same population.

3. **Evaluating Each Option**:
- **Option A**: This describes xenogamy (cross-pollination between different plants) and does not fit geitonogamy.
- **Option B**: This is the correct definition of geitonogamy, as it involves pollen from one flower fertilizing another flower on the same plant.
- **Option C**: This describes autogamy (self-pollination) and is not related to geitonogamy.
- **Option D**: This also describes a form of cross-pollination but does not fit the definition of geitonogamy, as it involves different plants.

4. **Conclusion**:
- The correct answer is **Option B**: Fertilization of a flower by the pollen from another flower of the same plant.

### Final Answer:
Geitonogamy involves the fertilization of a flower by the pollen from another flower of the same plant.

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