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.
Inside the petals are a flower's sexual organs, its stamens and pistil. The pistil consist of three parts: stigma, style, and ovary. The stigma traps pollen grâ¦ains that are needed for fertilization of eggs. The style is a narrow stalk that supports the stigma.