Biology A (Salters-Nuffield) A-Level
Secondary thickening
What Secondary thickening means in Biology A (Salters-Nuffield) A-Level, as defined for Pearson Edexcel.
Definition of Secondary thickening
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Reference: Pearson Edexcel
The addition of extra cellulose and lignin to the primary wall, increasing rigidity and waterproofing.
Topics that use Secondary thickening
- Topic 4: Biodiversity and Natural Resources (Pearson Edexcel A-Level)
Related terms
- Adaptation and speciation
- Allele frequency change over time
- Amyloplast
- Aseptic technique
- Binary fission
- Biodegradability
- Calcium and magnesium in plant structure and function
- Cellulose
Using Secondary thickening in the exam
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