Specifically, cones are the reproductive structures of conifers, which are a type of gymnosperm. Gymnosperms are a group of plants that produce seeds that are not enclosed within a fruit.

Here's why cones are not seedless:

* Male cones produce pollen, which contains the male gametes.

* Female cones contain ovules, which develop into seeds after fertilization by pollen.

So, cones are an essential part of the seed-producing process for conifers.