This is the KEY difference between seedless plants (bryophytes and ferns) and seeded plants (gymnosperms and angiosperms)! In seedless plants the sperm must SWIM through fill in blank to reach the egg and for fertilization to occur. Indicate the evolutionary order of the following plant groups 1-4: Select ALL of the teeny, tiny, little gametophytes in vascular plants (check all that apply) stigmas ovaries ovules (eggs) pollen stamen.