GCSE BIOLOGY 8461/2F Paper 2 Foundation Tier Mark scheme June 2021 Version: 1.0 Final Mark Scheme. rated A+

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Question Answers Extra information Mark AO / Spec. Ref. 01.1 Alfred Russel Wallace Charles Darwin 1 1 AO1 4.6.3.1 4.6.3.2 01.2 remains of an organism from a long time ago allow remains of an... animal / plant allow from thousands / millions of years ago 1 1 AO1 4.6.3.5 01.3 the animal walked on mud 1 AO2 4.6.3.5 01.4 any two from: • flooding • drought • ice age • global warming • volcanic activity • asteroid collision • (new) predators • (new) disease / pathogen • competition for food • competition for mates • lack of habitat or habitat change if none of these, allow climate change for 1 mark ignore weather if neither of these, allow catastrophic event or natural disaster for 1 mark allow hunters / poachers allow named example allow lack of food allow lack of mates ignore competition unqualified ignore environment change ignore isolation ignore pollution 2 AO1 4.6.3.6 01.5 bacteria can become resistant to an antibiotic older fossils are simpler than more recent ones 1 1 AO1 4.6.2.2 4.6.3.4 Total 9MARK SCHEME – GCSE BIOLOGY – 8461/2F – JUNE 2021 8 Question Answers Extra information Mark AO / Spec. Ref. 02.1 A 1 AO1 4.5.3.1 02.2 D 1 AO1 4.5.3.1 4.5.3.2 02.3 liver 1 AO1 4.5.3.2 02.4 glycogen 1 AO1 4.5.3.2 02.5 2.6 7.6 (mmol/dm3) allow answers in the range 2.5 to 2.7 allow a correctly calculated value using student’s value from graph + 5 1 1 AO2 4.5.3.2 02.6 30 (minutes) allow ½-hour or 0.5 hour 1 AO2 4.5.3.2 02.7 points too far apart or no reading between 30 and 50 mins or points joined by straight lines or values could have fallen to zero change before 50 mins allow no reading at 40 mins allow not a curve of best fit 1 AO3 4.5.3.2MARK SCHEME – GCSE BIOLOGY – 8461/2F – JUNE 2021 9 Question Answers Extra information Mark AO / Spec. Ref. 02.8 higher values of y than given line returning to(wards) zero change later than given line 1 1 AO2 AO3 4.5.3.2 Total 10 [Show More]

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