Part not used in vegetative reproduction:
Vegetative reproduction is a form of asexual reproduction in plants where new individuals are produced from vegetative parts of the parent plant. One part that is not used in vegetative reproduction is the seed.

Seed:
- Seeds are not used in vegetative reproduction because they are produced through sexual reproduction, involving the fusion of male and female gametes.
- The formation of seeds requires pollination, fertilization, and development of the embryo, which are processes not involved in vegetative reproduction.
- Seeds contain genetic material from both parent plants, leading to genetic diversity in the offspring, unlike vegetative reproduction where the new plants are genetically identical to the parent plant.

Vegetative parts used in vegetative reproduction:
- Vegetative reproduction utilizes various parts of the plant such as stems, roots, leaves, and specialized structures like bulbs, tubers, and runners.
- These vegetative parts have the ability to give rise to new plants without the involvement of seeds or sexual reproduction.
- Examples of vegetative reproduction include cutting a stem from a plant and allowing it to develop roots and grow into a new plant, or dividing a clump of bulbs to create multiple new plants.
In conclusion, while seeds play a crucial role in sexual reproduction and genetic diversity in plants, they are not involved in vegetative reproduction. This process allows plants to propagate and multiply rapidly by utilizing their vegetative parts to produce genetically identical offspring.