And God said, “Let the earth sprout vegetation, plants yielding seed, and fruit trees bearing fruit in which is their seed, each according to its kind, on the earth.” And it was so.
Day Three continues with the creation of Vegetation. Specifically plants and trees that bear seeds and fruits with seeds. So on Day Three God has created DNA.
He has also created forests and jungles, glens and fields. I can't imagine the beauty of the world on this day. There is still no sun, but there must have been a glorious perfect light shining down, possibly from God Himself. And there was every plant imaginable. Nothing had gone extinct.
And those commands that were written in on this day, those commands written into those seeds, have continued to this day. When you walk outside today, glory at His creation.