For self pollination flower must be:

Options

A. Asexual
B. Monosexual
C. Unisexual
D. Bisexual.

Answer

**Step-by-Step Solution:**

1. **Understanding Self-Pollination**: Self-pollination is a type of pollination where pollen grains from the anther of a flower are transferred to the stigma of the same flower. This means that the flower can fertilize itself without needing pollen from another flower.

2. **Identifying Flower Types**: To determine which type of flower can undergo self-pollination, we need to look at the structure of the flower. Flowers can be classified into different types based on their reproductive structures:
- **Asexual**: These flowers do not involve sexual reproduction and are not relevant to self-pollination.
- **Monosexual**: These flowers have either male (stamens) or female (carpels) reproductive organs, but not both. Therefore, they cannot self-pollinate.
- **Unisexual**: Similar to monosexual, these flowers have only one type of reproductive organ (either male or female), making self-pollination impossible.
- **Bisexual**: These flowers contain both male (stamens) and female (carpels) reproductive organs, allowing them to self-pollinate.

3. **Conclusion**: Since self-pollination requires the presence of both anther and stigma in the same flower, the correct answer is that for self-pollination, the flower must be **bisexual**.

**Final Answer**: For self-pollination, the flower must be **bisexual**.

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