In a process of coevolution, flowers developed floral rewards such as nectar and longer tubes, and bees developed longer tongues to extract the nectar. Bees also developed structures known as scopal hairs and pollen baskets to collect and carry pollen.
The coevolutionary relationship between flowers and bees is characterized by reciprocal adaptations where both parties benefit from their interactions. Flowers provide nectar and pollen as rewards, while bees utilize these resources to obtain energy and nutrients. Bees have evolved specialized structures for collecting nectar and pollen, such as longer tongues and scopal hairs.