Biology / Unit 10 Bio 2169 short lesson, about 20 seconds
Algae versus Land Plants, the Defining Line
Captions available
The idea
"Land plant" names the embryophyte clade, defined by a protected, parent-retained embryo; algae is a broader label including non-embryophyte lineages.
In practice
Green and red algae in Archaeplastida share chloroplast ancestry with land plants, per Bio 1997; brown algae reach that label independently.
Where people slip
"Seaweed is a plant," per Bio 2167, collapses a label onto one clade — the two are not interchangeable.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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