Q1 - St Thomas More Catholic School, Nuneaton€¦ · (c) Coronary heart disease (CHD) develops...

M1

(a)(i)A=(cell)membrane1

B=cytoplasm

donotacceptcytoplast1

(ii)Tocontroltheactivitiesofthecell

1

(b)

extralinescancel3

Q2

Thediagrambelowshowsthepartsofthebodythatdigestandabsorbfood.

Italsoshowssomedetailsaboutthestructureofthestomach.

(2)

(b)(i)Thebloodgoingtothestomachhasahighconcentrationofoxygen.Thecellsliningthestomachhavealowconcentrationofoxygen.

Completethefollowingsentence.

Oxygenmovesfromthebloodtothecellsliningthestomachby

theprocessof......................................................................(1)

(a)Completethetabletoshowwhethereachstructureisanorgan,anorgansystemoratissue.

Foreachstructure,tick( )onebox.

Structure

Organ Organ system

Tissue

Mouth, oesophagus, stomach, liver,

M2

all 3 correct = 2 marks

2 correct = 1 mark

1 or 0 correct = 0 marks

2

(b)(i)diffusionallowphoneticspelling

1

(a)

Organ Organ sys‐

tem Tissue

Mouth, oesophagus, stomach, liver, pancreas,

Organ Organ sys‐

tem Tissue

Mouth, oesophagus, stomach, liver, pancreas,

(a)

Q2b

(1)

(Total 5 marks)

Q3

Thediagrambelowshowsacross‐sectionofaplantroot.Thetransporttissuesarelabelled.

(a)(i)WhatistissueA?

Drawaringaroundthecorrectanswer.

cuticleepidermisxylem(1)

(ii)NametwosubstancestransportedbytissueA.

1.............................................................................................................

2.............................................................................................................

(iii)Inwhichpartofacelldoesaerobicrespirationtakeplace?

(ii)Whatothersubstancemustmovefromthebloodtothecellsliningthestomachsothatrespirationcantakeplace?


protein starch

mitochondria nucleus mitochondria nucleus

(iii)Inwhichpartofacelldoesaerobicrespirationtakeplace?

(ii)Whatothersubstancemustmovefromthebloodtothecellsliningthestomachsothatrespirationcantakeplace?


protein starch

Q2b (ii)glucose

1

(iii)mitochondria

1

[5]

M3

(a)(i)xylem1

(ii)water

1

minerals/ions/namedexample(s)

ignorenutrients1

Q3b

(b)Phloemisinvolvedinaprocesscalledtranslocation.

(i)Whatistranslocation?

...............................................................................................................

...............................................................................................................

...............................................................................................................(1)

(ii)Explainwhytranslocationisimportanttoplants.

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................(2)

(1)

(ii)Explainwhyactivetransportisnecessaryinroothaircells.

...............................................................................................................

...............................................................................................................

...............................................................................................................

...............................................................................................................

(c)Plantsmustuseactivetransporttomovesomesubstancesfromthesoilintoroothaircells.

(i)Activetransportneedsenergy.

Whichpartofthecellreleasesmostofthisenergy?

Tick( )onebox.

(c)Plantsmustuseactivetransporttomovesomesubstancesfromthesoilintoroothaircells.

(i)Activetransportneedsenergy.

Whichpartofthecellreleasesmostofthisenergy?

Tick( )onebox.

M3b and c (b)(i)movementof(dissolved)sugar

allowadditionalsubstances,egaminoacids/correctnamedsugar(allowsu-crose/glucose)allownutrients/substances/foodmoleculesifsuf icientlyquali iedignorefoodalone

1

(ii)sugarsaremadeintheleaves

1

sotheyneedtobemovedtootherpartsoftheplantforrespiration/growth/storage

1

(c)(i)mitochondria

1

(ii)formovementofminerals/ions

Donotaccept‘water’1

againsttheirconcentrationgradient

1

[9]

Q4

The igurebelowshowsascaledrawingofonetypeofcellinblood.

(a)Usethescaletodeterminethewidthofthecell.

Giveyouranswertothenearestmicrometre.

........................................................................................................................

........................................................................................................................

Widthofcell=..................................micrometres(1)

(3)

(c)Plateletsarefragmentsofcells.

Plateletshelpthebloodtoclot.

Suggestwhatmighthappeniftheblooddidnotclot.

........................................................................................................................

........................................................................................................................(1)

(Total5marks)

(b)Completethetablebelow.

Func on

Carries oxygen around the body

Protects the body against infec on

Func on

Carries oxygen around the body

Protects the body against infec on

(b)Completethetablebelow.

M4

(a)8(micrometres)1

(b)redbloodcell(s)1

whitebloodcell(s)acceptnamedcellegphagocyte/lymphocyte

1

(plasma)transportsproteins/dissolvedsubstances/food(molecules)/urea/hormones/bloodcells

1

(c)anyonefrom:

•youcouldlosealotofblood•bleedinternally

allowbleedingwouldnotstopallowcouldbleedtodeath

1

[5]

Q5a

Amylaseisanenzymethatdigestsstarch.

AstudentinvestigatedtheeffectofpHontheactivityofamylase.

Thisisthemethodused.

1.Mixamylasesolutionandstarchsuspensioninaboilingtube.

2.Puttheboilingtubeintoawaterbathat25°C.

3.Removeadropofthemixtureevery30secondsandtestitforthepresenceofstarch.

4.RepeattheinvestigationatdifferentpHvalues.

Thetablebelowshowsthestudents’results.

(a) The student concluded pH 7.25 was the op mum pH for the amylase enzyme.

This is not a valid conclusion.

Suggest two reasons why.

1 .....................................................................................................................

........................................................................................................................

2 .....................................................................................................................

........................................................................................................................

(2)

Time when no starch was detected in minutes

7.0

4.5

3.0

2.0

1.5

1.5

2.0

Time when no starch was detected in minutes

7.0

4.5

3.0

2.0

1.5

1.5

2.0

M5a

(a)anytwofrom:

•sameresultatpH7and7.5orcouldbeanypHbetween7and7.5ornottestedatpH7.25orneedtotestatsmallerpHintervals(between7and7.5)•accuracyofresultonlytonearest0.5minutes•norepeats•dif iculttodetermineendpoint(colour)

2

Q5bandc

(b)Thestudentdidanotherinvestigation.Thisisthemethodused.

1.Putamylasesolutionandstarchsuspensionintoaboilingtube.

2.MakethepH7.25.


4.Measuretheamountofsugarproducedevery30seconds.

Theresultsareshowninthe igurebelow.

Calculatethemeanrateofsugarproducedperminuteduringthe irst5minutes.

........................................................................................................................

........................................................................................................................

Meanrate=...............................unitsperminute(2)

(c)Iodinesolutionisaddedtoasampletakenfromtheboilingtubeafter10minutesand60minutes.

Suggestwhatyouwouldseeinthesesamples.

After10minutes.............................................................................................

........................................................................................................................

.After60minutes............................................................................................

........................................................................................................................(2)

(d)Thescientistrepeatedtheinvestigationat37°C.

Drawalineonthe igureabovetoshowthepredictedresults.(2)

(Total8marks)

Q5bandc

(b)Thestudentdidanotherinvestigation.Thisisthemethodused.

1.Putamylasesolutionandstarchsuspensionintoaboilingtube.

2.MakethepH7.25.


4.Measuretheamountofsugarproducedevery30seconds.

Theresultsareshowninthe igurebelow.

Calculatethemeanrateofsugarproducedperminuteduringthe irst5minutes.

........................................................................................................................

........................................................................................................................

Meanrate=...............................unitsperminute(2)

(c)Iodinesolutionisaddedtoasampletakenfromtheboilingtubeafter10minutesand60minutes.

Suggestwhatyouwouldseeinthesesamples.

After10minutes.............................................................................................

........................................................................................................................

.After60minutes............................................................................................

........................................................................................................................(2)

(d)Thescientistrepeatedtheinvestigationat37°C.

Drawalineonthe igureabovetoshowthepredictedresults.(2)

(Total8marks)

M5bandc

(b)2.7/51

0.54(unitsperminute)allow0.52withnoworkingshownfor2marks

1

allow1markfor0.52or0.56

(c)(after10minutes)solutiongoesblack1

(after60minutes)solutionstaysthesameordoesnotgoblackorgoesslightlyorange

1

(d)steepercurve1

levelsoffat11.8unitsandbefore45minutes1

[8]

Q6

Figure1showsadiagramofthehumanheart.

Figure1

(a)NamepartsAandB.

A....................................................................................................................

B....................................................................................................................(2)

(b)WhatisthefunctionofbloodvesselC?

Tickonebox.

To take blood from the heart around the body

To take blood from the body to the heart

To take blood from the heart to the lungs

To take blood from the lungs to the heart

(b)WhatisthefunctionofbloodvesselC?

Tickonebox.

To take blood from the heart around the body

To take blood from the body to the heart

To take blood from the heart to the lungs

To take blood from the lungs to the heart

M6 a and b

(a)(A)rightatrium1

(B)rightventricle1

(b)Totakebloodfromthelungstotheheart1

Q6

(c)Coronaryheartdisease(CHD)developswhenlayersoffattymaterialbuildupinthecoronaryartery.

OnetreatmentforCHDistoinsertastentintothecoronaryartery.

Figure2showsastentinacoronaryartery.

Figure2

Explainwhythestenthelpstopreventaheartattack.

........................................................................................................................

........................................................................................................................

........................................................................................................................

........................................................................................................................

........................................................................................................................

........................................................................................................................

........................................................................................................................

........................................................................................................................(4)

M9(a) (i) bonds / pair of electrons / shared electrons

for one mark 1

(ii) saturated since it has single bonds / no double bonds / no multiple bonds / maximum number of atoms attached

for one mark 1

(iii) sensible answer (e.g. it is harmful) or better solvent could be used on expanded polystyrene or foam

for one mark 1

(b) (i) simply writing monomers form / react to form polymers gains no mark monomers join / bond / combine / link to form polymers = 1 mark the mark is for the idea of joining to gain the second mark the idea of the relative size of monomer and polymer is required small molecules join to form a polymer (2 marks) many monomers join to form a polymer (2 marks) monomers join to form a large molecule / long chain (2 marks) many molecules join together (2 marks)

for 1 mark each 2

(ii) polyethene / poly(ethene) / polythene

don’t worry too much about the exact positioning of the C6H5 at the end of the bond

placement of linking bonds inside / outside brackets is not important must have n

for 1 mark each [8]

Q6 d,e,f

Plot the missing bars for countries D and E on Figure 3.

Use data from the table above.

Figure 3

(2)

(e)PeopleincountryBaremorelikelytodiefromCHDthanpeopleincountryE.

HowmanymoretimesaslikelyarepeopletodiefromCHDincountryBthanincountryE?(1)

(f)Astudentconcluded:

‘ThefactorthatcausesCHDisnoteatingenoughfruitandvegetables.’

Evaluatethestudent’sconclusion.

UsedatafromFigure3,andyourownknowledge,inyouranswer.(6)

(Total16marks)

(d)Lookatthetablebelow.

Country

Number of deaths from CHD per 100 000 popula‐on per year

Amount of fruit and vege‐tables eaten in kg per person per year

A 285 180

B 250 320

C 198 250

D 151 220

E 125 244

M6d,e,f

(d)barDcorrectlyplotted1

barEcorrectlyplotted1

±0.5smallsquares

(e)twice/twotimes(morelikely)1

(f)Level3(5–6marks):Adetailedandcoherentevaluationisprovidedthatconsidersarangeofrelevantpointsabouthowwellthedatacorrelateswiththestatement,quotingrelevantcomparisonsandcomestoaconclusionconsistentwiththereasoning.

Level2(3–4marks):Anattempttorelaterelevantpointswithinthedataandcometoaconclusion.Thelogicmaybeinconsistentattimesbutbuildstowardsacoherentargument.

Level1(1–2marks):Discrete,relevantpointsmade,attemptingtoapplyunderstandingofthefactorsinvolvedindevelopmentofCHDtothedatainthetable.Thelogicmaybeunclearandtheconclusion,ifpresent,maynotbeconsistentwiththereason‐ing.

0marks:Norelevantcontent

Indicativecontent

datathatsupportsstatement:•countryAhasthehighestdeathrateat285deathsper1000andthelowestconsumptionatonly180kgperperson•deathrateincountryEislessthanhalfthatincountryA(125comparedwith285)andconsumptionishigher(244comparedwith180)•othercountrieswithlowerdeathratesthanAhavehigherconsumption(egcountryB250deathsper1000butconsumptionof320kgperperson)argumentsagainststatement:•butmostofthedataonthegraphdoesnotshowclearcorrelationbetweendeathratesandconsumptionofdata•egdeathrateincountryBissecondhighestat250deathsper1000butconsumptionishighestat320kgperperson,nearlydoublethatinAwheredeathrateisonly35per1000more•differencesshownoclearpattern–egincountrieswheredeathrateismuchlowertheconsumptionisnotasimilarproportionhigher(cfcountryDdeathratejustunderhalfthatinAbutconsumptionnotdoublethatinA)•theremaybeotherfactorsaffectingdeathratethatarenotreported,suchassmoking,obesity,exercise,stress

6

[16]

Q7a

Scientistsinvestigatedtheeffectofdifferentfactorsonhealth.

(a)Peoplewhoarenotactivemayhavehealthproblems.

Thegraphshowsthepercentageof16‐year‐oldsinsomecountrieswhoarenotactive.

(i)Whatpercentageof16‐year‐oldsintheUKarenotactive?

..........................%(1)

(ii)Whatpercentageof16‐year‐oldsintheUKareactive?

..........................%(1)

(iii)Anewspaperheadlinestates:

InformationinFigure1doesnotsupportthenewspaperheadline.

Suggestonereasonwhythenewspaperheadlinemaybewrong.(1)

M7

(a)(i)641

(ii)36allowe.c.ffrom(i)i.e.100−answergivenin(a)(i)

1

(iii)anyonefrom:•onlyconsiders16‐year‐olds

ignorelackofevidenceallowdoesnotrefertoallages

•onlyaboutsome/5countriesallowdoesnotrefertoallcountries.

1

Q7 b,c

Whitebloodcellsarepartoftheimmunesystem.

Usethecorrectanswerfromtheboxtocompleteeachsentence.

(i) When we are ill, white blood cells produce .............................................. to kill microorganisms.

(1)

(ii) Many strains of bacteria, including MRSA, have developed resistance to drugs called

...............................................................................................................

What conclusion can be made about the effect of exercise on health?

Use informa on from the table.

(c)Inheritedfactorscanalsoaffecthealth.

Giveonehealthproblemthatmaybeaffectedbythegenessomeoneinherits.


(b)Doctorsgaveapercentageratingtothehealthof16‐year‐olds.100%isperfecthealth.

Thetableshowstheamountofexercise16‐year‐oldsdoandtheirhealthrating.

Amount of exercise done in minutes every week

Health ra ng as %

Less than 30

72

90

76

180

82

300

92

an bio cs

an bodies pathogens vaccines

an bio cs

an bodies pathogens vaccines

What conclusion can be made about the effect of exercise on health?

Use informa on from the table.

(c)Inheritedfactorscanalsoaffecthealth.

Giveonehealthproblemthatmaybeaffectedbythegenessomeoneinherits.


(b)Doctorsgaveapercentageratingtothehealthof16‐year‐olds.100%isperfecthealth.

Thetableshowstheamountofexercise16‐year‐oldsdoandtheirhealthrating.

Amount of exercise done in minutes every week

Health ra ng as %

Less than 30

72

90

76

180

82

300

92

M7(b)themoreexercisedonethehealthierapersonis

allowthemoreexercisedonethehigherthehealthratingallowthelessexercisedonethelowerthehealthrating

1

(c)havingahighcholesterollevel

1

(d)(i)antibodies1

(ii)antibiotics1

[7]

M8

ThenumberofpeopleintheUKwithtumoursisincreasing.

(a)(i)Describehowtumoursform.(1)

(ii)Tumourscanbemalignantorbenign.

Whatisthedifferencebetweenamalignanttumourandabenigntumour?(1)

(b)Describehowsometumoursmayspreadtootherpartsofthebod(1)

(i)Describethetrendsinthenumberofpeoplewithmalignantmelanomaskincancerbetween1985and2008.

(3)

(ii)Usethedataaboutthenumberoftripsabroadtosuggestanexplanationforthetrendsyouhavedescribedinpart(c)(i). (2)

(c)PeoplefromNorthernEuropehavefairskinandmanypeoplehavemalignantmelanomaskincancer.

ThegraphshowshowthenumberofpeopleintheUKwithmalignantmelanomachangedbetween1985and2008.

ThebarsonthegraphshowthenumberofpeopleintheUKwhotravelledabroadandthenumberwhotookcheapholidaysinthesunin1985and2005.

Years

Key

Mean for all areas

Mean for people from rich areas

Mean for people from poor areas

Total number of trips abroad

Number of cheap holidays in the sun

M8

(a)(i)(asaresultof)uncontrolled/abnormalgrowth/divisionofcellsignoremutationallowcellsdividingwithnocontactinhibition

1

(ii)benigntumoursdonotinvade/spreadtoothertissues/donotformsecondarytumours

acceptconverseformalignantacceptbenigntumoursdonotmetastasise

1

(b)viatheblood/circulatorysystem

acceptvialymphaticsystem1

(c)(i)incidenceisincreasing

1

morerapidly(overtheyears)ignore igures

1

differencebetweenrichandpoorareasisgettinglessortheincidenceisrisingfastestinpeoplefrompoorareas

acceptconverseforpeoplefromrichareas1

(ii)riskfactorisUVfromsunlight

ignoreionisingradiation1

moreUKcitizensgoingabroadortakingholidaysintheSunorpoorerpeoplecanaffordholidaysintheSunormorepoorerpeoplearetakingholidaysintheSun

1

[8](

Q9 a and b

Thediagrambelowshowsthehumandigestivesystem.

(a)(i)WhatisOrganA?


gallbladderliverstomach(1)

ii)WhatisOrganB?


largeintestinepancreassmallintestine(

(b)Digestiveenzymesaremadebydifferentorgansinthedigestivesystem.

Completethetablebelowputtingatickorcross(intheboxes.

The irstrowhasbeendoneforyou.

Organ producing enzyme

salivary glands

stomach pancreas

small intes ne

Enzyme

amylase Yes No Yes Yes

lipase

protease

M9 a and b

1 mark per correct row

or

if no correct row max 1 mark for any one correct column

2

(a)(i)stomach

(ii)smallintestine

(b)

salivary glands stomach pancreas small intes ne

amylase

Yes No Yes Yes

lipase

No No Yes Yes

protease

No Yes Yes Yes

salivary glands stomach pancreas small intes ne

amylase

Yes No Yes Yes

lipase

No No Yes Yes

protease

No Yes Yes Yes

(a)(i)stomach

(ii)smallintestine

(b)

Q9 c and d

(3)

(c)Thestomachalsomakeshydrochloricacid.

Howdoestheacidhelpdigestion?

........................................................................................................................

........................................................................................................................

(d)Drawonelinefromeachdigestiveenzymetothecorrectbreakdownproduct.

Breakdown products

amino acids.

Amylase breaks down

bases.

Lipase breaks down

fa y acids and glycerol.

Protease breaks down

sugars.

Breakdown products

amino acids.

Amylase breaks down

bases.

Lipase breaks down

fa y acids and glycerol.

Protease breaks down

sugars.

(c)Thestomachalsomakeshydrochloricacid.

Howdoestheacidhelpdigestion?

........................................................................................................................

........................................................................................................................

(d)Drawonelinefromeachdigestiveenzymetothecorrectbreakdownproduct.

M9candd(c)enzyme/protease/pepsinmosteffectiveinacidconditions/lowpH

acceptoptimum/correctpHdonotacceptreftoincorrectlynamedenzymesignorekillingbacteriaignoreacidbreaksdownfood

1

(d)EnzymeBreakdownproducts

3

[8]

Q10 Plants need different substances to survive.

Figure1showstherootsofaplant.

(a)(i)Mineralionsareabsorbedthroughtheroots.

Nameoneothersubstanceabsorbedthroughtheroots.(1)

(2)

(iii) The plant in Figure 1 has roots adapted for absorp on.

Figure2showsamagni iedpartofarootfromFigure1.

DescribehowtherootinFigure2isadaptedforabsorption.(2)

(ii)TheplantinFigure1hasahigherconcentrationofmineralionsinthecellsofitsrootsthantheconcentrationofmineralionsinthesoil.

Whichtwostatementscorrectlydescribetheabsorptionofmineralionsintotheplant’sroots?

Tick( )twoboxes.

(ii)TheplantinFigure1hasahigherconcentrationofmineralionsinthecellsofitsrootsthantheconcentrationofmineralionsinthesoil.

Whichtwostatementscorrectlydescribetheabsorptionofmineralionsintotheplant’sroots?

Tick( )twoboxes.

M10 a

(a)(i)water/H2OacceptoxygenallowH2OdonotallowH2OorH2O

1

(ii)themineralionsareabsorbedbyactivetransport1

theabsorptionofmineralionsneedsenergy1

(iii)have(manyroot)hairs1

(which)givealargesurfacearea(forabsorption)1

Q10

(1)

(ii)DescribehowtheappearanceofthestomatainleafBisdifferentfromtheappearanceofthestomatainleafA.

(1)

(iii)Themanforgetstowatertheplant.

WhatmighthappentotheplantinthenextfewdaysifthestomatastaythesameasshowninleafAinFigure3?

(1)(Total9marks)

(b)Theleavesofplantshavestomata.

Whatisthefunctionofthestomata?(1)(1)

(c)Figure3showstheundersideoftwoleaves,AandB,takenfromaplantinaman’shouse.

(i)InFigure3,thecellslabelledXcontrolthesizeofthestomata.

WhatisthenameofthecellslabelledX?

Tick( )onebox.

(b)Theleavesofplantshavestomata.

Whatisthefunctionofthestomata?(1)(1)

(c)Figure3showstheundersideoftwoleaves,AandB,takenfromaplantinaman’shouse.

(i)InFigure3,thecellslabelledXcontrolthesizeofthestomata.

WhatisthenameofthecellslabelledX?

Tick( )onebox.

M10b,c

(b)carbondioxideinoroxygenoutorcontrolwaterloss

acceptgasexchangeignoregasesinandoutignoregain/losewater

1

(c)(i)guardcells

1

(ii)(stomataare)closedallowthereisnogap/space

1

(iii)plantwillwilt/droopignoredie

1

[9]

Q11Some students inves gated the effect of light intensity on the rate of photosynthesis.

TheyusedtheapparatusshowninDiagram1.

Diagram1

Thestudents:

•placedthelamp10cmfromthepondweed

•countedthenumberofbubblesofgasreleasedfromthepondweedin1minute

•repeatedthisfordifferentdistancesbetweenthelampandthepondweed.

(a) Thelampgivesoutheataswellaslight.

(i) At distances between 15 cm and 50 cm, light was a limi ng factor for photosynthesis.

What evidence is there for this in the table?

(1)

(ii)Giveonefactorthatcouldhavelimitedtherateofphotosynthesiswhenthedistancewasbetween10cmand15cm.

(1)

Whatcouldthestudentsdotomakesurethatheatfromthelampdidnotaffecttherateofphotosynthesis

(b)Thetableshowsthestudents’results.

Distance in cm Number of bubbles

10 84

15 84

20 76

40 52

50 26

Distance in cm Number of bubbles

10 84

15 84

20 76

40 52

50 26

Whatcouldthestudentsdotomakesurethatheatfromthelampdidnotaffecttherateofphotosynthesi

(b)Thetableshowsthestudents’results.

M11 a and b

(a)anyonefrom:ignore‘checktemperature’

•addawaterbath•heatscreen•useLED•lowenergybulb/described

1

(b)(i)rate/numberofbubblesdecreases

acceptconversewithreferencetoincreasinglightorshorterdis-tance

orlessoxygen/gasreleased

ignorereferencetorateofphotosynthesis1

(ii)temperature/CO2(concentration)

accept‘itwastoocool’ornotenoughCO2acceptnumberofchloroplasts/amountofchlorophyllallowheatallowCO2donotallowCO2

1

Q11

(c)InthisquestionyouwillbeassessedonusinggoodEnglish,organisinginformationclearlyandusingspecialisttermswhereappropriate.

Diagram2showsasectionthroughaplantleaf.

Diagram2

Describethestructureoftheleafandthefunctionsofthetissuesintheleaf.

Youshouldusethenamesofthetissuesinyouranswer. (6)

M11 c

(c)MarksawardedforthisanswerwillbedeterminedbytheQualityofWrittenCommunication(QWC)aswellasthestandardofthescienti icresponse.ExaminersshouldalsorefertotheinformationintheMarkingguidance,andapplya‘best‐ it’approachtothemarking.0marksNorelevantcontent.Level1(1‐2marks)Thereisabriefdescriptionofatleast1tissueoratleast1functionofanindicatedpartoftheleaf.Theaccountlacksclarityordetail.

Level2(3‐4marks)Thereisacleardescriptionwhichincludesatleast1namedtissueandatleast1correctfunctiondescribedforanindicatedpartoftheleaf.Level3(5‐6marks)Thereisadetaileddescriptionofmostofthestructuresandtheirfunctions.Examplesofresponses:•epidermis•covertheplant•mesophyll/palisade•photosynthesises•phloem•xylem•transport.Thefollowingpointsareallacceptablebutbeyondthescopeofthespeci ication:•(waxy)cuticle–reducewaterloss•epidermis–nochloroplastssoallowslighttopenetrate•stomata/guardcells–allowCO2in(andO2out)orcontrolswaterloss•palisade(mesophyll)–manychloroplaststotraplight–neartopofleafforreceivingmorelight•spongy(mesophyll)–airspacesforrapidmovementofgases

6

Q1 - St Thomas More Catholic School, Nuneaton€¦ · (c) Coronary heart disease (CHD) develops...

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Transcript of Q1 - St Thomas More Catholic School, Nuneaton€¦ · (c) Coronary heart disease (CHD) develops...