What are plants that produce seeds and flowers

All plants produce seeds and flowers unless they are genetically modified or have an unusual mutation. It's their way to reproduce themselves.

Explanation:

These seed plants fall into two groups, angiosperms and gymnosperms. Angiosperms are the flowering plants. Their seeds develop inside a female reproductive part of the flower, called the ovary, which usually ripens into a protective FRUIT. Gymnosperms (conifers, Ginkgo, and cycads) do not have flowers or ovaries.

Explanation:

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).