This Feb. 26 file photo shows roses during preparations for the Philadelphia Flower Show at the Pennsylvania Convention Center in Philadelphia. A study of roses that have a strong scent revealed a previously unknown chemical process in their petals that is key to their fragrance. Experts said the finding might let scientists restore a pleasing scent to rose varieties that have lost it because of breeding for traits like color or longevity. Results are reported in a study released today by the journal Science. Story here. (AP Photo/Matt Rourke)

Question: Which color of rose is your favorite?