Because only a very few seeds will find a good germination ground under normal conditions, so the strategy for plants, as for other R selected organisms, is to cast many lower quality seeds into the environment and improve the chances that some will survive and reproduce.
Also to ensure their survival against several predators and hostile environmental conditions so that those seed bearing plants can survive and transmigrate.
one makes seeds and another does not make seeds
is it true that all plants make seeds
Plants reproduce and make new plants by seeds: They get planted or settle in an area and then grow to new plants. Seeds are not the only ways plants reproduce and make new plants. Some plants use bulbs, branches, pollen,etc.
seeds for new plants
nonvascular plants
All seed bearing plants will bear seeds if they are the female plant.
Most plants make seeds but a chemical plant doesn't make seeds it makes chemicals.
Hosta flowers do make seeds.
First, they make new plants. No seeds, no more plants. Second, we eat a lot of those seeds. Wheat, corn, rice, beans, nuts- are all seeds.
fertilization
They are grown from seeds
to reproduce!