Most plants reproduce with their flowers. The flower contains two kinds of reproductive structures: stamens and pistils. Stamens produce pollen grains. These pollen grains are transported from one flower to another either by the wind or by a pollinator, such as an insect. The pistils receive these pollen grains, and interact with them. This process is known as pollination. 

After pollination, a process known as fertilization begins. In fertilization, the pollen grain and the egg cell of the pistil are fused together. When this happens, a seed begins to develop. In time, the seed is released and can grow into a new plant.