This is an example of sexual reproduction because for the flower to grow, and reproduce, it needs pollen. To a flower, pollen is just like a sperm, it is what fertilizes. Whenever a bee wants food, it visits a flower, which then collects pollen from the stamen in a flower. The pistil from the flower is what collects the pollen from a bee that had collected pollen. Then the ovule gets fertilized and turns into a seed.