As a boy in the 1950s I knew there were two kinds of tomatoes: deep red, plump and tasty ones my grandfather grew, and the kind that came four in a package wrapped in cellophane. The Cello-Wraps, as I think of them, had no flavor whatsoever. They were.
If you would like to start saving seeds, read the seed packet or catalog and make sure what you buy is labeled open-pollinated or heirloom, not hybrid.
Where do carrot seeds come from, and how can you get them? Learn how to save carrot seeds without cross-pollination with wild carrot, or Queen Anne's Lace.