The Serpent Seed Doctrine, aka The Two Seedline Doctrine. And God saith, `Let the earth yield tender grass, herb sowing seed, fruit-tree (whose seed [is] in itself) making fruit after its kind, on the earth:’ and it is so. And the earth bringeth forth tender grass, herb sowing seed after its kind, and tree making fruit (whose seed [is] in itself) after its kind; and God seeth that [it is] good; Genesis 1:11-12 (YLT)

The seed of a tree is in the fruit. When you eat the fruit, you eat the seed. Trees are reproduced by way of their fruit. Let this sink in. The activity in the Garden was procreative. The notable feature of a tree is that it has seed in itself, reproducing after its kind!