Continued self pollination lead to inbreeding depression. List three devices, which flowering plant have developed to discourages self pollination ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Inbreeding Depression**: Inbreeding depression occurs when self-pollination leads to reduced biological fitness due to a lack of genetic diversity. This is a concern for flowering plants that rely on self-pollination over generations.

2. **Self-Incompatibility Mechanism**: One device that flowering plants have developed to discourage self-pollination is self-incompatibility. This is a genetic mechanism that allows a plant to recognize its own pollen. If the pollen is genetically similar to the ovule (egg), the plant will reject it, preventing fertilization.

3. **Asynchronous Release of Gametes**: Another strategy is the asynchronous release of pollen and ovules. In this mechanism, the timing of pollen release (male gametes) and ovule availability (female gametes) is not synchronized. For example, if the ovule is released first, the pollen may not be available at that time, thus promoting cross-pollination.

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