AQA GCSE Biology Paper 2 Higher Tier -
Questions And Answers
Complete btable b1 bto bcompare bsexual breproduction bwith basexual breproduction.
Write ba btick bin bthe bbox bif bthe bstatement bis btrue.
The bfirst brow bhas bbeen bcompleted bfor byou. b- bcorrect banswers✔✔Sexual
breproduction
-cell bdivision boccurs
-fertilisation boccurs
asexual breproduction
-cell bdivision boccurs
-genes bare bpassed bon bfrom bparent bto boffspring
-offspring bare bgenetically bidentical bto beach bother
Students binvestigated bthe bpopulation bof bearthworms bin bthe bsoil bin btwo bdifferent
bareas.
-Area bA: ba bgrass blawn
-Area bB: ba bfarmer's bfield
Chemical bX bcan bbe bmixed bwith bwater band bpoured bonto bthe bsoil.
The bmixture bbeings bearthworms bto bthe bsurface bof bthe bsoil bbut bdoes bnot bharm bthe
bearthworms.
Plan ban binvestigation busing bchemical bX bto bcompare bthe bnumber bof bearthworms
bper bm^2 bin bareas bA band bB. b- bcorrect banswers✔✔-Same bconcentration bof
bchemical bapplied bto bthe bsoil
-Same bvolume bof bchemical bapplied bto bthe bsoil
-Same bsize bof barea bsampled be.g. b1m^2 bor b0.25m^2
-Use bof bquadrat
-Same btime bbetween bapplication band bcollecting bworms
-Same btime ballowed bfor bcollecting bworm bafter bapplication
-Each bsample barea bselected brandomly
-Method bachieving brandomness be.g. brandom bcoordinates
-Count bworms bin beach bof bthe bareas bA band bB
-At bleast b5 brepeats bin beach bof bthe bareas bA band bB
, -Calculate bmean
-Compare bmeans
Explain bthe beffect bof ba bhigh bconcentration bof binsulin bhas bon bblood bglucose
bconcentration. b- bcorrect banswers✔✔Effect: blowered
Explanation: bGlucose bis btaken bin bby bcells
Table b2 bshows: b
-the bresults bof bthe bblood btest
-the bmean bresults bfor bpeople bwho bdo bnot bhave bdiabetes
Type b2 bdiabetes boccurs bwhen bbody bcells bhave ba breduced bresponse bto binsulin.
Give btwo bways bthe bresults bof bthe bblood btest bshow bthat bperson bC bmight bhave
bType b2 bdiabetes. b- bcorrect banswers✔✔high bconcentration bof binsulin
high bglucose
Give btwo bways bthat ba bperson bcan breduce bthe bchance bof bdeveloping btype b2
bdiabetes b- bcorrect banswers✔✔more bexercise
eat ba blow bcarbohydrate bdiet
Name bthree bharmful bsubstances bthat bcould bcause bwater bpollution
Do bnot brefer bto bplastic bor bto blitter bin byour banswer b- bcorrect banswers✔✔Fertiliser
Sewage
herbicide
Describe bhow bsubstances bthat bpollute bair band bwater bcould bbe bharmful bto bhumans
band bother bliving borganisms b- bcorrect banswers✔✔Air bpollution
- bSulfur bdioxide bcauses bdamage bto bleaves bso bless bphotosynthesis btake bplace.
-damage bto broots bor balters bions bin bsoil bso bless bprotein bis bmade.
- bdamage bto blungs bwhich bcan blead bto bbreathing bdifficulties.
-Carbon bmonoxide bcombines bwith bhaemoglobin bso bless boxygen bis bcarried.
-Particulates bblocks blight bleading bto bless bphotosynthesis btaking bplace band bless
bglucose bbeing bmade
- bdamage bto blungs bcan bcause basthma
Water bpollution
-Sewage bcauses bbacteria bto bmultiply band buse boxygen bfor brespiration.
-water banimals bcannot brespire b
-pathogens bin bwater
-fertiliser bcauses balgae bto bmultiply
-algae bblock blight bso bplants bcannot bphotosynthesise
- black bof boxygen bfor brespiration bso bfish bdie
(plastics) b• bentrap banimals bor bcausing binternal bdamage bif bswallowed
Questions And Answers
Complete btable b1 bto bcompare bsexual breproduction bwith basexual breproduction.
Write ba btick bin bthe bbox bif bthe bstatement bis btrue.
The bfirst brow bhas bbeen bcompleted bfor byou. b- bcorrect banswers✔✔Sexual
breproduction
-cell bdivision boccurs
-fertilisation boccurs
asexual breproduction
-cell bdivision boccurs
-genes bare bpassed bon bfrom bparent bto boffspring
-offspring bare bgenetically bidentical bto beach bother
Students binvestigated bthe bpopulation bof bearthworms bin bthe bsoil bin btwo bdifferent
bareas.
-Area bA: ba bgrass blawn
-Area bB: ba bfarmer's bfield
Chemical bX bcan bbe bmixed bwith bwater band bpoured bonto bthe bsoil.
The bmixture bbeings bearthworms bto bthe bsurface bof bthe bsoil bbut bdoes bnot bharm bthe
bearthworms.
Plan ban binvestigation busing bchemical bX bto bcompare bthe bnumber bof bearthworms
bper bm^2 bin bareas bA band bB. b- bcorrect banswers✔✔-Same bconcentration bof
bchemical bapplied bto bthe bsoil
-Same bvolume bof bchemical bapplied bto bthe bsoil
-Same bsize bof barea bsampled be.g. b1m^2 bor b0.25m^2
-Use bof bquadrat
-Same btime bbetween bapplication band bcollecting bworms
-Same btime ballowed bfor bcollecting bworm bafter bapplication
-Each bsample barea bselected brandomly
-Method bachieving brandomness be.g. brandom bcoordinates
-Count bworms bin beach bof bthe bareas bA band bB
-At bleast b5 brepeats bin beach bof bthe bareas bA band bB
, -Calculate bmean
-Compare bmeans
Explain bthe beffect bof ba bhigh bconcentration bof binsulin bhas bon bblood bglucose
bconcentration. b- bcorrect banswers✔✔Effect: blowered
Explanation: bGlucose bis btaken bin bby bcells
Table b2 bshows: b
-the bresults bof bthe bblood btest
-the bmean bresults bfor bpeople bwho bdo bnot bhave bdiabetes
Type b2 bdiabetes boccurs bwhen bbody bcells bhave ba breduced bresponse bto binsulin.
Give btwo bways bthe bresults bof bthe bblood btest bshow bthat bperson bC bmight bhave
bType b2 bdiabetes. b- bcorrect banswers✔✔high bconcentration bof binsulin
high bglucose
Give btwo bways bthat ba bperson bcan breduce bthe bchance bof bdeveloping btype b2
bdiabetes b- bcorrect banswers✔✔more bexercise
eat ba blow bcarbohydrate bdiet
Name bthree bharmful bsubstances bthat bcould bcause bwater bpollution
Do bnot brefer bto bplastic bor bto blitter bin byour banswer b- bcorrect banswers✔✔Fertiliser
Sewage
herbicide
Describe bhow bsubstances bthat bpollute bair band bwater bcould bbe bharmful bto bhumans
band bother bliving borganisms b- bcorrect banswers✔✔Air bpollution
- bSulfur bdioxide bcauses bdamage bto bleaves bso bless bphotosynthesis btake bplace.
-damage bto broots bor balters bions bin bsoil bso bless bprotein bis bmade.
- bdamage bto blungs bwhich bcan blead bto bbreathing bdifficulties.
-Carbon bmonoxide bcombines bwith bhaemoglobin bso bless boxygen bis bcarried.
-Particulates bblocks blight bleading bto bless bphotosynthesis btaking bplace band bless
bglucose bbeing bmade
- bdamage bto blungs bcan bcause basthma
Water bpollution
-Sewage bcauses bbacteria bto bmultiply band buse boxygen bfor brespiration.
-water banimals bcannot brespire b
-pathogens bin bwater
-fertiliser bcauses balgae bto bmultiply
-algae bblock blight bso bplants bcannot bphotosynthesise
- black bof boxygen bfor brespiration bso bfish bdie
(plastics) b• bentrap banimals bor bcausing binternal bdamage bif bswallowed
