Biology A-Level
rate per unit time
What rate per unit time means in Biology A-Level, as defined for AQA.
Definition of rate per unit time
Check what you remember
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Reference: AQA
Productivity is measured per unit time, such as kJ m-2 year-1, because it is a rate.
Topics that use rate per unit time
- Energy and ecosystems (A-level only) (AQA A-Level)
Related terms
- biological molecules
- biomass
- calorimetry
- Condensation reactions
- decomposers and saprobionts
- dry mass per unit area
- energy per gram of dry mass
- faeces and excretion
Using rate per unit time in the exam
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