Biology · May / June 2021 · Paper 62 · Question 2

lines: single clear line, no shading ;

size: length bigger than 70 mm ;

detail one: 5–10 prickles on the top half of the leaf including the apex ; detail two: main vein with side veins ;

measuring line PQ = 70±1 mm ;;

correct calculation of magnification of candidate’s drawing ;

50 ;

12 (average number of prickles per leaf) ;;

collected many leaves / 10 leaves, from each height ;

collected leaves from, more than one / each / five, tree(s) ;

axes: labelled with units as height (above ground on each holly tree) / m and average number of prickles (per leaf) ;

scale: evenly scaled and plots occupying half of grid in both directions ; plots: six points plotted accurately ± half a small square ;

line: suitable line drawn ;

16 / 17 / 18 ;

0.5 (m) / 1.0 (m) ;

iodine ;

blue-black ;