Biology A-Level
faeces and excretion
What faeces and excretion means in Biology A-Level, as defined for AQA.
Definition of faeces and excretion
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Reference: AQA
Not everything eaten is digested, so a large fraction leaves the herbivore in faeces, and surplus amino acids are deaminated, losing energy in urine.
Topics that use faeces and excretion
- 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
- growth and reproduction
Using faeces and excretion in the exam
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