What is a defining characteristic of the carpel/pistil of a flower?

The carpel, also known as the pistil, is a crucial part of a flower as it is involved in reproduction. One of its defining characteristics is that it develops into the fruit after fertilization occurs. When the ovules within the carpel are fertilized by male gametes, this leads to the formation of seeds, and the surrounding tissues of the carpel then develop into the fruit. This process is essential for the protection of seeds and often aids in their dissemination.

The other aspects of flower structure, such as supporting the flower, attracting pollinators, or containing male gametes are features associated with different parts of the flower. The stamens are responsible for producing male gametes, while petals often attract pollinators, and the receptacle or stem provides support. Recognizing the distinct role of the carpel enhances our understanding of plant reproduction and the life cycle of flowering plants.