Biology A (Salters-Nuffield) A-Level
three-phased testing
What three-phased testing means in Biology A (Salters-Nuffield) A-Level, as defined for Pearson Edexcel.
Definition of three-phased testing
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Reference: Pearson Edexcel
Testing that progresses from safety and dosage in small groups, to efficacy and side effects in larger patient groups, then to larger-scale comparison with existing treatments.
Topics that use three-phased testing
- 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 three-phased testing in the exam
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