Mention two strategies evolved to prevent self-pollination in flowers.

Explanation

To answer the question about the two strategies evolved to prevent self-pollination in flowers, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Self-Pollination**:
- Self-pollination occurs when pollen grains from the anther of a flower are transferred to the stigma of the same flower or to the stigma of another flower on the same plant. This process can lead to reduced genetic diversity.

2. **First Strategy - Dicogamy**:
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