Bees and flowers have evolved together for millions of years. It is a mutual relationship where the bee is provided with food (nectar or pollen) and the stationary plant gets to
its pollen (sperm cells) to other plants of the same species. For the plant this is much more
than using wind to reach the goal. Consequently, over millions of years plants have developed flowers with increasingly specialized features to attract
bees who, in turn, would distribute pollen grains and optimize the plant's reproductive
. Simultaneously, bees underwent physiological, behavioral and structural adaptations to take advantage of the nutritional benefits offered by flowering plants. This is an example of a
relationship.