Biology · Oct / Nov 2023 · Paper 61 · Question 2

length of line CD = 100 ±1(mm) ;

167 ;;

any two from:

(lizard red blood cells are) bigger ;

(lizard has) no white blood cells ;

(lizard red blood cells have) oval shape / AW ;

(lizard red blood cells) have a nucleus / are darker in the middle / are lighter on the outside ;

outline is a single clear line with no shading ;

size at least 41 mm in diameter ;

detail 1: small lobe to the bottom right of the upper section drawn ; detail 2: thin line joining lobes on both sides ;

(mean) mass of haemoglobin (per athlete) ;

axes labelled with units – i.e. number of days (after returning to low altitude) and (mean) mass of haemoglobin (per athlete) / g ; suitable linear scale and plotting area occupies at least half of the grid in both directions ;

seven points plotted ± half small square ;

suitable line drawn ;

any indication on the candidate’s graph of a reading taken ;

correct reading at 17 days from candidate’s graph ± half a small square ;

the more carbohydrate in the diet, the more exercise they can do / the longer the exercise time / the slower they get exhausted ;

any two from:

sex ;

age ;

mass / weight / BMI / fat to muscle ratio / height ;

ref. to diet ;

sport discipline / fitness / exercise regime ;

medical history or (named) health conditions / illness ;

lifestyle qualified (e.g. smoking / alcohol consumption / drugs) ;

(add) Benedict’s (solution to the sample) ;

heat (and observe the colour) ;

iodine (solution) ;