Q21 · 2020 · Paper 1Unclassified2 marks
QUESTION 21 (2 marks)
A count was conducted to determine the number of individuals for five different bird species in a woodland.
Calculate the relative percentage abundance of species B. Show your working.
WORKED SOLUTION
2 marksQCAA guide · typeset solution
QCAA sample response and mark allocation
21 | % aaaaaaaaaaaaaaaaaa= nnnn. iiiiiiiiiiiiiiiiiiiiii ffffff ssssssssssssss BBnnnn. iiiiiiiiiiiiiiiiiiiiii ffffff aaaaaa ssssssssssssss × 100% aaaaaaaaaaaaaaaaaa=3550 + 35 + 10 + 20 + 25 × 100% aaaaaaaaaaaaaaaaaa= 35140 × 100 = 25% | • shows accurate substitution [1 mark] • states 25% [1 mark] | ||
QCAA sample response and marking criteria reproduced from the official guide.
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