Although we always think of bees and flowers together, it was in fact only 25 million years after the first flowers evolved that the bee appeared.
It is believed that bees evolved from a species of wasp that fed on pollen-covered beetles and then they started to develop a preference for pollen.
Before bees, flowers relied on wind and beetle pollinators for fertilisation. The relationship that developed between bees and flowers influenced the evolution of both profoundly. Bees became better at collecting pollen, their bodies became hairier and they developed a greater ability to recognise different flower types. With this, the competition for attention had now risen. Flowers began changing shape, becoming more colourful to stand out and produced more food to keep the bees returning. This co-evolution resulted in the astounding diversity of both species we see today.