AQA Biology Paper 2 Higher Tier Mark

01.1 primary consumer 1 AO2 4.7.2.1 4.7.4.1 01.2 correct shape: 4 tiers with largest at bottom and smallest at top 1 AO2 4.7.4.2 correctly labelled: dragonfly / nymph in this order or allow: 3rd-order or tertiary consumer or apex / top predator or (trophic level) 4 1 + hydra 2nd-order or secondary consumer or (trophic level) 3 + daphnia 1st-order or primary consumer or herbivore or (trophic level) 2 + algae producer or (trophic level) 1 allow for 2 marks inverted pyramid if correctly labelled 01.3 any one from: (Daphnia biomass smaller because) • non-digestible parts (of algae) or lost in faeces • not all absorbed • lost in urine / urea ignore waste 1 AO1 4.7.4.3 • used in respiration or lost as carbon dioxide / CO2 allow excretion allow (to supply energy) for movement / warmth • algae not all eaten or eaten by other organisms • some algae decompose allow used to supply energy