Biology · May / June 2023 · Paper 62 · Question 2

any one from:

to get a representative sample ;

to avoid bias ;

to, identify / exclude, anomalies / outliers ;

to increase confidence in results / to increase reliability / to check reliability ;

value indicated on graph ;

3.3 (m2) ;

57(%) ;;;

59 ;

cm2 ;

method:

(add) Benedict’s (reagent) ;

heat ;

positive test:

green / yellow / orange / (brick) red / red-brown / brown ;

outline – single clear unbroken line ;

size – at least 65mm wide ;

detail 1: five lobes ;

detail 2: one main leaf vein in each lobe ;

similarity:

lobed (AW) / number of lobes (AW) / presence of

veins / pattern of veins / uneven edge ;

difference:

grapevine leaf /

fig leaf / fig. 2.2 / first leaf

fig. 2.3 / second leaf serrated / pointy /

smooth / wavy vs

sharp / rough / ragged

/ rounded

no stalk / no petiole

vs

stalk / petiole

fewer veins

or

more veins