Biology · Oct / Nov 2021 · Paper 61 · Question 2
0610
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2(a)(i)[1]
temperature ;
2(a)(ii)[2]
any two from:
light intensity / distance of lamp/light (from plant) / wattage of light bulb ; colour or wavelength of light ;
time, for collecting gas / for equilibration ;
same / type / species / size / mass / age, of plant ;
amount / mass / concentration, of sodium hydrogencarbonate / carbon dioxide, added ;
2(a)(iii)[1]
to identify anomalous results ;
2(b)(i)[3]
54(%) ;;;
2(b)(ii)[4]
axes labelled with units ;
even scale that occupies at least half the grid in both directions ;
six correct plots ± half a small square ;
suitable line ;
2(b)(iii)[2]
rate / volume, increases (with temperature) and then decreases ;
relevant data quote ;
2(b)(iv)[2]
indication that reading has been taken at 17 °C shown on graph ;
correct reading of value from candidate’s graph ;
2(c)(i)[5]
outline clear single lines without shading ;
size occupies at least half the space available ;
detail 1: five anthers ;
detail 2: seven petals ;
stigma labelled ;
2(c)(ii)[3]
line XY 90±1 (mm) ;
15 mm ;;
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