Biology / Unit 10 Bio 2167 short lesson, about 20 seconds
"Seaweed Is a Plant"
Captions available
The idea
Calling seaweed a plant overstates a real relationship — most seaweed is multicellular algae related to land plants by shared ancestry but outside the land-plant group.
In practice
Kelp, a brown alga, belongs to the stramenopile lineage outside Archaeplastida, sharing no ancestor exclusive to land plants.
Where people slip
This entry states the popular overgeneralization — Bio 2169 gives the criterion separating algae from land plants.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Something wrong in this lesson? Flag it · Sources for Biology