In plant reproduction for Angiosperms, it is good to identify the male and female part of a flower. On flowers there are the stamens, the male part, which include the filament and the anthers. The female part of the flower is called the pistil that includes the ovary, stigma and the style. The anthers are a fluffy part of the flower that produced pollen, and the stigma is a sticky part of the flower that is supposed to have pollen stick to it.
Now pollinators play a big role in plant reproduction because they transport the pollen. Flower petals attract bees or other pollinators to come to it. When the pollinator lands on the flower it rubs against the stamens, and little pollen grains stick to the pollinator. As that pollinator flies around and lands on another flower some of those mature pollen grains will come off and stick to the stigma.
The pollen that sticks to the stigma has a tube cell and a generative cell. The tube cell from the pollen grain is released and travels down the pollen tube that is in the pistil of the flower. The tube cell travels down the stigma to the style to the inside area of the ovary. The generative cell then travels down the tube and will divide into two sperm cells. The sperm cell will them try and target an ovule. Each ovule has potential to develop into a seed if it is fertilized, and has anegg cell and two polar nuclei. Once the sperm cells have found the ovule, one sperm cell will go into the egg cell and create a zygote, while the other will join with he two polar nuclei and develop into an endosperm. This process is called double fertilization. After the egg cell has become fertilized the ovule will develop into a seed, using the endosperm as food for development.
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