A rabbit eats grass.
Not all of the biomass in the grass becomes biomass in the rabbit.
Which statement gives one reason for this?
The rabbit uses some of the biomass from the grass to photosynthesise.
Some of the grass is not digested and is egested by the rabbit in faeces.
The rabbit stores all of the glucose from the grass as new body tissue.
The grass contains less glucose than the rabbit needs for its growth.
111 exam-style questions on OCR GCSE Biology 4.1 Ecosystems, covering 4.1.1 Cycling of materials in ecosystems, 4.1.2 Microorganisms in cycling materials, 4.1.3 The carbon and water cycles, 4.1.4 Factors affecting decomposition, 4.1.5 Levels of organisation in an ecosystem, 4.1.6 Abiotic and biotic factors affecting communities, 4.1.7 Interdependence and competition, 4.1.8 Trophic levels, 4.1.9 Pyramids of biomass, and 4.1.10 Efficiency of biomass transfers. Each one has a worked solution and a mark scheme showing where the marks go.