Self-pollination is a process in which a flower's pollen fertilizes its own ovules. This can occur in plants that have both male and female reproductive structures, allowing them to produce seeds without needing pollen from another plant. Self-pollination is common in species like peas and tomatoes, which can thrive in isolated conditions. This method of reproduction ensures that plants can reproduce even when pollinators, such as bees or butterflies, are scarce. While self-pollination can lead to less genetic diversity, it allows for a reliable means of propagation, especially in stable environments where conditions remain consistent.