Biology / Unit 11 Bio 2513 short lesson, about 20 seconds
Primary Growth: Apical Meristem Elongation
Captions available
The idea
Primary growth lengthens a stem or root through cell division and elongation confined to the apical meristem at each tip.
In practice
A seedling's stem lengthens entirely from new cells added at its growing tip, not from stretching along its existing length.
Where people slip
Herbaceous plants rely almost entirely on primary growth, showing little to no increase in thickness over their lifetime.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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