Differentiate between wind pollinated and insect pollinated flowers.

Wind pollinated plants: In wind pollinated plants, the pollen grains are light and small in nature. In wind pollinating plants, wind is the pollinator. In wind pollinated plants the flowers do not contain nectar.

Insect pollinated plants:  In insect pollinated plants, the pollen grains are large and sticky in nature. In insect pollinated plants, insect is the pollinator.  In insect pollinated plants, the flowers contain nectar.