Cross-pollination

Definition

Cross-pollination occurs when pollen from the anther of one flower is transferred to the stigma of another flower, often of the same species. This process promotes genetic diversity within a plant population.

5 Must Know Facts For Your Next Test

1. Cross-pollination can be facilitated by wind, water, insects, or other animals.
2. It results in greater genetic variability compared to self-pollination.
3. Many flowering plants have evolved mechanisms to encourage cross-pollination and discourage self-pollination.
4. The success of cross-pollination often depends on the compatibility between the pollen and the receiving flower's stigma.
5. Some plants are specifically adapted for cross-pollination through specialized structures or timing of reproductive phases.

Review Questions

• What are two primary advantages of cross-pollination over self-pollination?
• Name three agents that can facilitate cross-pollination.
• How do certain plants ensure that cross-pollination occurs instead of self-pollination?

Related terms

Self-Pollination: The transfer of pollen from the anther to the stigma of the same flower or another flower on the same plant.

Pollinator: An organism that helps carry pollen from one flower to another, aiding in cross-pollination.

Stigma: The part of a flower's pistil where pollen germinates during pollination.