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.
Flower Structure, Pollination and Fertilisation. Flowers are the organs of sexual reproduction in plants. They have the following important structures: Once you are sure that you can name the parts of the flower, the process of fertilisation is easy to understand. Just take a look at the following slideshow.