Biology / Unit 10 Bio 2177 short lesson, about 20 seconds
Seedless Vascular Plant Traits: Vascular Tissue, Sporophyte Dominance
Captions available
The idea
Seedless vascular plants evolved xylem and phloem for water and sugar transport, letting the sporophyte generation grow larger and dominate the visible plant.
In practice
A fern's leafy fronds are its sporophyte; its gametophyte grows as a small, separate, short-lived structure on the ground.
Where people slip
Vascular tissue, not seeds, is this group's defining trait — seedless vascular plants still reproduce by releasing spores.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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