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GCSE Biology · key term
An increase in the length of a cell, contributing to growth of a plant organ.
Used by Edexcel and OCR
Specification 2.5, 6.15B · Paper 1, Paper 2
An increase in the length of an existing plant cell, usually as water enters and enlarges its vacuole.
Revise: Growth in OrganismsPlants also make newly produced cells longer by cell elongation.
When comparing animal and plant growth, write matched statements: animals use cell division and differentiation, whereas plants also use cell elongation.
In an explanation of bending, link the full sequence: stimulus → unequal auxin distribution → unequal cell elongation → curvature.
State the complete causal chain: stimulus → unequal auxin distribution → unequal cell elongation → bending.
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Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
An increase in a cell's length, which can contribute to the growth and bending of a plant organ.
Revise: Plant HormonesRoots respond differently to a high auxin concentration: it inhibits rather than promotes cell elongation. This difference explains why the same unequal distribution of auxin can make a shoot bend upwards while making a root bend downwards.