Short Notes:

Upon pollination, a flower may become a fruit, nut, grain, and in some cases, vegetables. Plants have sweet fruits to attract birds and other pollinators. When the pollinator eats a fruit, it will incidentally scatter the seeds and spread the plant species.

Seed growth begins when a pollen grain lands on the sticky stigma at the tip of the carpel, the female structure. The pollen grain contains two sperm, or male reproductive cells. A tube grows down from the stigma through the style to the ovary. There, one sperm fuses with the egg cell, or ovum. This cell becomes the embryo. The other sperm fuses with two other cells, becoming a tissue called endosperm, which nourishes the embryo. The starchy, nutritious part of grains such as wheat and oats comes from endosperm.