List three strategies that a bisexual chasmogamous flower can evolve to prevent self-pollination (autogamy).

Explanation

To prevent self-pollination (autogamy), bisexual chasmogamous flowers can evolve several strategies. Here are three key strategies:

### Step-by-Step Solution:

1. **Dichogamy**:
- **Definition**: This is a mechanism where the timing of pollen release and stigma receptivity is not synchronized. In other words, the male and female reproductive parts do not mature at the same time.
- **Example**: In the plant Datura, the stigma becomes receptive before the pollen is released. This means that when the stigma is ready to receive pollen, the pollen from the same flower is not yet available, encouraging cross-pollination from other flowers.

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