Select the character that separates conifers from grasses.
 

Conifers are gymnosperms, which are plants that don't bear fruit but instead produce bare seeds, whereas grasses are monocots with fibrous root structures. The leaves feature parallel venation, and they have a hollow, slender cylindrical stem. Conifers differ from grasses in that they develop endosperm before fertilisation; endosperm feeds the embryo. The seeds of grass, also known as angiosperms or flowering plants, are enclosed in an ovary or fruit. The ovary matures into a fruit, which protects and disperses the seeds.