Biology / Unit 11 Bio 2621 short lesson, about 20 seconds
Seed Dormancy and Germination Cues
Captions available
The idea
Seed dormancy is a period of suspended growth ending only when species-specific cues — cold, light, fire, or a softened seed coat — signal favorable germination conditions.
In practice
A temperate seed requiring vernalization stays dormant through winter cold, germinating only once conditions turn favorable in spring.
Where people slip
Dormancy can last months to decades depending on species — not a fixed, universal waiting period.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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