Linked from
The 28 pages that link to Ovule, each with the reason it gives.
FlowerBroader topic: Fertilized ovules inside the flower's ovary develop into seeds.
Seed plantBroader topic: Seed plants form seeds from ovules after fertilization.
Seed coneBroader topic: Ovules sit on seed-cone scales before fertilization.
Pine coneBroader topic: Ovules sit on female cone scales and become seeds after fertilization.
GynoeciumBroader topic: Ovules develop inside the gynoecium and become seeds after fertilization.