AQA GCSE COMBINED SCIENCE: TRILOGY 8464/B/2F Biology Paper 2F Mark scheme 2023

any one from: • practice • fewer distractions • familiarity (with test) ignore repeating allow reference to effect of caffeine allow answers referring to competitiveness eg the student wanted to beat a previous time 1 AO3 4.5.2 4.5.1 RPA6 2 bars correctly plotted and 2 bars correctly labelled as seeing (the stimulus) and hearing (the stimulus) (y axis label) (mean reaction) time in milliseconds / ms allow a tolerance of ± 1⁄2 a small square allow any width bars touching or not allow bars in either order 1 1 AO2 4.5.2 4.5.1 RPA6 (when seeing stimulus reaction time is) longer / greater / higher allow converse for hearing stimulus if clearly stated allow bigger / larger allow slower (reaction time) allow slower (reactions) allow 130 milliseconds more ignore 130 milliseconds unqualified 1 AO3 4.5.2 4.5.1 RPA6 (when seeing stimulus reaction time is) longer / greater / higher allow converse for hearing stimulus if clearly stated allow bigger / larger allow slower (reaction time) allow slower (reactions) allow 130 milliseconds more ignore 130 milliseconds unqualified 1 AO3 4.5.2 4.5.1 RPA6 more / increased carbon dioxide (in air) or less carbon dioxide absorbed / used (by plants) (due to) less photosynthesis allow (due to) more decay / burning (of plants) allow 2 marks for less carbon dioxide used for photosynthesis if no other mark awarded allow 1 mark for carbon dioxide is used in photosynthesis 1 1