Biology A-Level
controls and control variables
What controls and control variables means in Biology A-Level, as defined for AQA.
Definition of controls and control variables
Check what you remember
Read the wording for your board, then hide it and explain controls and control variables in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A sterile water control disc is included, and a named variable such as disc size, volume of antimicrobial, incubation temperature and time, or the same culture and agar is controlled.
Topics that use controls and control variables
- Genetic diversity and adaptation (AQA A-Level)
Related terms
- advantage depends on environment
- allele
- allele passed to offspring
- altered tertiary structure
- aseptic technique
- bacterial lawn
- Data interpretation and evaluation
- different alleles and phenotypes
Using controls and control variables in the exam
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