Explain outbreeding devises in angiospermic plants.

Explanation

### Step-by-Step Solution

1. **Definition of Outbreeding Devices**:
Outbreeding devices in angiospermic plants are adaptations that prevent self-pollination, thereby promoting cross-pollination. Cross-pollination is essential for genetic variation.

2. **Understanding Pollination**:
Pollination is the transfer of pollen grains from the anther (male part) to the stigma (female part) of a flower. Self-pollination occurs within the same flower, while cross-pollination occurs between different flowers.

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