Autogamy is

Options

A. Trasfer of pollen grains from anther to stigma of the same flower
B. transfer of pollen grains from anther to stigma of another flower
C. Pollination between two flower
D. Maturation of anther and stigma at different times

Answer

**Step-by-Step Solution:**

1. **Understanding Pollination**: Pollination is defined as the transfer of pollen grains from the anther (the male part of the flower) to the stigma (the female part of the flower).

2. **Types of Pollination**: There are two main types of pollination:
- **Self-Pollination**: This occurs when pollen from the anther of a flower fertilizes the stigma of the same flower or another flower on the same plant.
- **Cross-Pollination**: This happens when pollen is transferred from the anther of one plant to the stigma of a flower on a different plant.

3. **Defining Autogamy**: Autogamy is a specific type of self-pollination. It occurs when pollen grains are transferred from the anther to the stigma of the same flower.

4. **Analyzing the Options**:
- **Option 1**: "Transfer of pollen grains from anther to stigma of same flower." - This matches the definition of autogamy.
- **Option 2**: "Transfer of pollen grains from anther to stigma of another flower." - This describes cross-pollination, not autogamy.
- **Option 3**: "Pollination between two flowers." - This is also indicative of cross-pollination.
- **Option 4**: "Maturation of anther and stigma at different times." - This describes a phenomenon known as dichogamy, not autogamy.

5. **Conclusion**: Based on the definitions and analysis of the options, the correct answer is **Option 1**: "Transfer of pollen grains from anther to stigma of same flower."

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