A rollback does a couple of things: 1  Most importantly, a rollback reverts a question (or answer) back to a previous version in the edit history. The rollback action itself then appears as the most recent item in the edit history. 2  A rollback clears any offensive flags that have been set on a question.
In each of these whorls are one of four organs, including petals, sepals, stamens, and pistils. Petals and sepals do not play an active role in the reproductive process. Stamens and pistils, the flower's male and female reproductive organs, do aid in reproduction.
The pistil is a flower's female organ. Pistils are typically located in the center of the flower and are surrounded by petals, sepals and stamens.Some flowers, such as the sweet pea, have one simple pistil, while others, including larkspur, have more than five pistils.reative Commons photo by Philip Bouchard. The pistil is a flower's female organ. Pistils are typically located in the center of the flower and are surrounded by petals, sepals and stamens. Some flowers, such as the sweet pea, have one simple pistil, while others, including larkspur, have more than five pistils.