Life Sciences Grade 11 March Test 2017 Paper & Memo

Downloaded from hlayiso.com testpapers.co.za

Life Sciences Downloaded from hlayiSO GOA common test Grade 11 INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. 2. 10. 11. Answer ALL the questions. Write ALL the answers in the ANSWER BOOK. Start the answers to EACH question at the top of a NEW page. Number the answers correctly according to the numbering system used in this question paper. Present your answers according to the instructions of each question. Make ALL drawings in pencil and Jabel them in blue or black ink. Draw diagrams, flow charts or tables only when asked to do so. The diagrams in this question paper are NOT necessarily drawn to scale. Do NOT use graph paper. You must use a non-programmable calculator, protractor and compass, where necessary. Write neatly and legibly. Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences March 2017 Common Test Grade 11 SECTION A QUESTION 1 1.4 Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A to D) next to the question number (1.1.1 to 1.1.5) in the ANSWER BOOK, for example 1.1.6 D. 1.1.1. The sea anemone is radially symmetrical because ... A __ it can be cut in mirror images in one plane only. B it can be cut in mirror images in two planes only. C __ it can be cut in mirror images in any vertical plane through its central axis. D it has an anterior and posterior end. 1.1.2 Study the list of characteristics below. (i) Small and green (ii) Large, red and yellow petals (iii)’ Produce nectar (iv) Have a scent (v) Small, light, smooth and dry pollen Which ONE of the following is characteristic of wind pollinated flowers? A (i), (ii) and (iv) only B (iii) and (v) only C (i) and (v) only D (v)only 1.1.3. Which ONE of the following plant groups has the gametophyte generation as the dominant phase? A Angiosperms B Bryophytes C Gymnosperms D -Pteridophytes 1.1.4 Transfer of pollen grains from anther to stigma is known as ... A __ seed dispersal. B pollination. C fertilisation. D germination. Copyright Reserved Please Turn Over

Downloaded from hlayiso,COM,, vont: Grade 11 Life Sciences 1.1.5 Which ONE of the following characteristics makes the spermatophytes more successful over other plant groups? Roots for anchorage Seeds with testa Leaves for photosynthesis Dominant sporophyte DOWD (5x2) (10) TOTAL SECTION A: 10 Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences March 2017 Common Test Grade 11 SECTION B QUESTION 2 2.1 Read the extract below and then answer the questions that follow. VIRUS AS MEDICINE Genetically engineered virus can cure cancer A study has revealed that a genetically modified form of the virus that causes the disease herpes is an effective remedy against skin cancer. The use of this virus to treat cancer (virotherapy) raises the average life expectancy of patients by 41 months as compared to other forms of therapy which increased the average life expectancy of patients by 21,5 months. The modified herpes virus multiplies inside cancer cells until they burst open. After virotherapy, the immune system becomes capable of detecting and attacking the cancer throughout the body. Adapted from http://rt.com/news 2.1.1. On average, how much longer (in months) did patients survive when on virotherapy as compared with other forms of therapy? (1) 2.1.2 Describe how the modified herpes virus kills the cancer cells. (2) 2.1.3 State the consequence of using UNMODIFIED herpes viruses for virotherapy. (1) 2.1.4 After virotherapy the immune system is able to detect the cancer cells. Explain how the immune system responds to attack the cancer cells. (2) Copyright Reserved Please Turn Over (6)

Downloaded from hlayisO.GOM), omnes Grade 11 Life Sciences 2.2 Agroup of Grade 11 learners investigated the changes in the composition of ethanol and glucose in a liquid mixture (containing yeast cells) during the brewing of traditional beer. The results of the investigation are represented in the graph below. Changes in glucose and ethanol concentration of beer over time ae —¢-Glucose ~m- Ethanol Q o y © & oF Ss 56 3 6 = oc so 4 4 : cn i: a ann na ae 0 10 20 30 40 50 60 70 80 90 Time (hours) Glucose/ethanol concentration (kgims} 2.2.1 Identify the independent variable in this investigation 2.2.2 Describe the relationship between changes in the concentration of glucose and ethanol over time. 2.2.3. State ONE way in which the investigator can ensure that the investigation is reliable. 2.2.4 During which period of time was glucose used the quickest? 2.2.5 Explain why the ethanol concentration remained constant between 50 to 60 hours. 2.2.6 Suggest why the ethanol concentration decreased after 60 hours. Copyright Reserved Please Turn Over (1) (2) (1) (2) (1) (9) [15]

Downloaded from hlayiso.com Life Sciences March 2017 Common Test Grade 11 QUESTION 3 3.1 The diagrams below represent four plant groups that you have studied. cad 3.1.1 State the LETTER only the plant group that: (a) Contain sori (b) Bears fruit (c) Have naked ovules (3) 3.1.2 Write down the number(s) only of the part(s) that represent reproductive structures. (2) 3.1.3 Explain ONE way in which the dependency on water for reproduction is reduced in Plant C. (2) 3.1.4 State TWO characteristics of the group represented by Plant D that prevent them from being as tall as the group represented by Plant A. (2) | (9) Copyright Reserved Please Turn Over

Life Sciences Downloaded from hlayiso,com, March 2 Grade 11 3.2 The diagram below represents the phylogenetic tree of different groups of animals. 3.2.1 3.2.2 3.2.3 3.2.4 protist State the ancestor of the animal kingdom. (1) Name the group of animals that is: (a) Asymmetrical (1) (b) Acoelomate (1) Which phylum, Cnidaria or Arthropoda is more closely related to the Chordata? (1) Explain your answer in QUESTION 3.2.3 (2) (6) [15] TOTAL SECTION B: 30 Copyright Reserved : Please Turn Over

Downloaded from hlayiso.com Life Sciences March 2017 Common Test Grade 11 SECTION C QUESTION 4 Describe the role of bacteria in maintaining balance in the environment, the importance of invertebrates in agriculture and ecosystems, and the significance of seed banks. Content: (17) Synthesis: (3) (20) NOTE: NO marks will be awarded for answers in the form of flow charts, tables or diagrams. TOTAL SECTION C: 20 GRAND TOTAL: 60 Copyright Reserved

Downloaded from hlayiso.com

Downloaded from hlayiso.com ponsosal 1yB1kdog “Busou uoissnosip twat jeuopeN Su} Je paydeose sem yi papiaoid jdesoy ABojoutuus; ul ueAlh seureu uowwos jg, *yXe]UO9 Jo Jno st UJ JO seous!og ajr] Ul ssjs Buimsuios uesu jou ssop y papiaoid ydeove ejqeziuBoI81 4 sioue Buyjedg = “ZL “yds00e Jou og Bulueew pepusyu! ay) seBueys pssn ebenbuey 3) “LL “aigeydecoe S14 ‘UaAi6 s{ iequunu Buoy ayy Inq suonsenb Jo souanbas ya10 ayy OU! SI JaMsuUe ff BHurequinu Bucs “OL “POLIO J] JAMSUE Jo Jseu BUY UPS9 ynq LONEIMeIgge peziuBooaiun eyy Wpelo Jou op ‘pauyep jou 4 ~semsue ul pauyep say. 41 ydesoy suonereiqge pesiubove1-u0oN —*G ‘ypelo auunser ‘urebe jaLioo sewooeq syut] pue souanbas J] pais jou op ‘PSLOOU! S| syuy pue sousnbes eieyy “Ypald ‘a0 ase syuly pue souenbss a1ey/, @SUaS SYEU JOU OP syul] pue pafppnui si aouenbes yo -g. “SHEL Oso] || Sa}epIPUeD suoldliosep jo peaysul uaai6 ore sueyo MOIS] “L SEL SSO} {IIM SBEpIPUeD Payinbai ese suogdiosep usym suonejouue YIM UaAIB axe swesBeIp J] -g “Bugeinge} Jou 40) syrews asoy jm seyepIpueg uaai6 ere sydesBesed yng paiinbas si voyeinqey i G “UeE|D S1e SOAUEIILUIS / SSOUBLEYIp JI Jdeooy uanl6 are suondiiosep pue 40} peyse are suoseduios yy “ped queag[al ypaio pue jje peay peuinbas Si}! 40 ped Ajuo uayM uaalB Ss] sseo0id afoum J] € *PSLOSUIPSLICN Je SUOS JO [Je JeyJsyM Jo aaqoedseu! SasU} IsuL SL] We uaAlB ore SAY pue pasinbal are suoseal sary} ‘ajduiexe 404 ‘yy Z “ulBrew puey-ybu Su} Ul XBW, pue seul] Anew e Ind pue peyoea: sl Swew wNWIxeW UeyM Bupyew dos sel UoWWOD /10Z Yuey ueAl6 s] peyesojje syseU UY] UONPUOJUI Q10W J} “L SAONAIOS 34M ONIMYVIN OL CALV1SY SS1dIONId uinpueioweyy -1 epe1p, seous1s 27 z J0A0 WIN ESBAIq pensesal 3yButdoo “seBed { JO sISISUOD WNpUBIOWOU SIU. 09 ‘SWYVIN SLVOlILYSS YOINSS TWNOILVN Loz HoRWWN 319s a4n “SHON: Volddav HLNOS AO OMaNdaYy uoneonpa jo Juswpedag jeyen-ninzemy uoimeonpy

OL Downloaded from hlayiso.com peruasal }yBukdog: (9) (2) “$|[90 Je0URD oy} AoMSap Oo} »SaIpoqnue eonpoid o} - peveb6iy eq jum _»sejosndios poojg oyUyA ey - vl] () /’sedisy asneo fim Asy ELT @ puedo ysing Keyy gun = /siieo seve apisul seydginuy = TES (0) SUILOW AS‘6L PLE Le ZNOLLSSAD ‘ a NOLLoas 2V NOILOAS TWLOL ; (on) (@xg) a SEL 7AE HEL Aca SLL PAO TEL APO VEL bh + NOLLSSNO V NOLLOZS ye] VOWWED /LOZ YEW, UNpUBOWaLy -f}epeD se0Us!9g SLT + ponresas 1yBukdoo -seBenbue| e1uyo je 01 a[qeaydde si sty) “peynsuco 8q pinoys eBenbue, jeowo juengje: au} ur yuaroyoud si yey} JeeW y Wed sf 4! ‘papas aq pinous ssemsue JOU/SIY ul JueTXe Jsarea15 oy} 0} pesn oBenBue] Juswssesse Slewleg] ou uel 1eyjo aBenGue| yeroujo Aue ut sueedde yey om) 10 psom aBuis y (sydequ0 pue suis3) SefenGuey perso jo Burysyms-epod = “gL uondeo e eney Ish (dj ‘sejgel ‘sydes6 ‘swes6eIp) suopeysnyy [iy uondeg “Lb “Kem JUsleyIp & Ul poyeys og Aeu YoIyM ‘Jamsue UB JO BSUS OU} 0} OAIISUES BG “GI. Ajeyesedss SUN JOS SYFEW SPLIOHE HIM WNPUBIOWSI] “SEU SSO] |[M Se}epIPUeD sjueweunseaui ul UaAtb Jou ese syuN yy “GL Upeid ON (essen aoa pue) uaai6 s} oweu AjUo puke JO} poyse Ss} 4979} Auo sy “PL 4881 UOUILOD 210% UOTE qwnpueloulayy -L Lepe1p, se0uens eyT &

Downloaded from hlayiso.com pewesai yBuddog 7 e\0fo-81 pure asn-al 10} aiqejreae Wey) Buryeu /‘SIUSLINU JO Bseg/a! BU} 0} BuIpesy /Sone9| Buikesep uo Buipesl Aq uogisodwosep Wey ASL * puononposdes Jueld ut Bunsisse suojeulod u; ajo eB Aejd sayerqayaauy wajsfsooe pure ainynoube ul sayesqapaAul JO ajOy (9 xew) / siaydsouje eyj ojU! yoeq seyeMU Wo. UeBoNIU LuNjes eLE}eg BurAumueg / Sule}o1d sonpoid 0} syueid Aq pequosqe aq ued YIU /SSIEMU O§ul (ZN) seh ueBoNU peAUOD UeD eLE}eq BUXY ua6onIN 7 Sleydsouje sy} Oyu! Peey PUe SpIXoIp Uoqed osee|eu Os|e ELIa}Neg esou / SIIB} SIOW Y SYBLU 0} [OS BUT UL Ps[dh0e1 Oq UD Jey} ASSOUEISGNS DIUEBHOUL O} Jaye S1uebio peep umop yeelq eveloeq onkydaideg / “PSUIEIUIEL S] SOUR]Eq SpPIXolp uogied pue uSHAXO AEM sIUy UL » ‘sissyjucsojoud Buunp uabéxo eseezer pue eprxorp uogueo esn Kay POO} D1UeBIO UMO JISyy sonposd euajeg a1udogoiny JUSWUOIAUS 9y} U] BoUeFeq Huyuseyurew ul eLa}Deq jo Bfoy ’ NOLLSSND. ONOILD3S of *@ NOILOAS TYLOL (s1) (9) (@) 7 soyssoue UOWWOD- /lus0e iO B aleYs SeyepIOYD pue spodoiyny - n=(e) PEUBPIUD YM UB - /SpodoyLY YIM SoRSHA}BJeY ety JO Jsow aueYys saepioyg - VTE () sspodouny ¢Z'¢ q) seyjujeyAeids ssuuomyel4 — (q) () elayiod/sobuods (e) zze 0) ASHOld LE ce yS81 voMWOg ZL0z Yor, unpueioway -) LapeD saauales alt] 9 (6) (6) (2) (2) (2) () (i) ie) (sb) (6) (1) (2) @ (1) (1) S81 UOWWOD J102 YEW peniases 1uBUAdoD (Aluo OAAL Isa EIN) SnJeUy ASeAee] PUE WSIS ‘s}OO) oN. ON- yonssi} Bulusujbuans ON- enssy Buyonpucope|nosen ON- Auy ASPIND ON- HL B{NAO By} UL plJS9 Ha euz 0} Apossp pares 8g 0} sejeweS afew smole yoium dojanep eqn) ueyod e uoyeULjod Jouy - /SBYJOUE OF JAMOY BuO WO, sjus6e Buneuyjod 10 pum Aq pewed ove sures6 ualjodg - ere AE PUR ALY SLE AW &) 7o fae) bre ve € NOLLSAND. Vet Apaqesodens sey peonpoid joueyje eu Jo swog - /peonpoid $i [oueYJa MSU OU B!OJOLeUy - St PSSOON|G SOU OU S| BEL - VET ASINOU AOL - 0 (Ajuo 4NO say) EW) Auy /sBuipees Auew Jo aBeseae eyy easy] - omar uonebyseau syy jeodey - /SOSESIIU! UOPEHUSOUOD JOUBYIS SU} - aA /S8SBSIVGP UOIJENUSOUOD Sscon|G ayy sy 7SuILL AA ct wnpuBowayy -| apeIs, g seualgg a1]

Downloaded from hlayiso.com ag 7WLOL GNVYD tO NOILOAS IVLOL eur L ue | spew 1] (biz) syueq peas yo souromubis - (4g) suissksoo8 0z pue esmynouse UL SBTEIGSPOAU! JO 9IO1 - (gf) JuatuuosAUS Jeuuew fea16o) & qJuaUUOLAUa 84} Ul ayy ul eLe}eq Jo sjoy- | ul peBuewe si ‘syueq peas | syueg pees jo eoueomusis 2Buymojjo} aut Jo yors 10} | pue seyeqepenul ‘eve}eq pue sayeiqeyenul peurergo eq pinoys Sew Jo 9j01 ayy BurpieBes | ‘eLeyeq Jo 9[0L 0} JURAIOL Burmoyo} ety seat iv UOReUUO} BYR IY |S! PEplAoid WOHELUOJUL {IY Kesse eu; Aq pannber souenbes uonsenb Sly 0} JUeARTS! spadse je paemsuy | j2d!6o e ul peBueve seep| | St pel AOI UOHBULOJUL IF aoa Husnbss POO, SSUBASION : AVSS3 JO NOLLVLNASAud SHL ONISSASSV {oz) (e) — :siseyjuks (4) quaquod (xen) paniesal 1ybuAdOD (2 xen) SO] UOWILIOD 2107 UE, . / pous}eaiuy auuiosaq sayddns pool ino eseo Ul _/odky auab OU} ULB]ULEWW 0} PEALSSUOD O12 quejd doso pue pooy jo sed pyim yeulbuQ- /anIPA [euloipaui jo aq jyBmw Jey ‘perresuos ove syueid snousbipul - / pauleysns are sejseds o1uepus osfty — - JUSWUONAUS By) 0} »PeonpoguIe! PUe Pe}oa}o1d eq UBD sjuEjd paseBuepUy - AWAY] BAISSUOD 0} JAWOPE Uy SyUeT Pees OY U} PeLOJs Be SPSeS ~ syueq pees Jo asuesyiubig Asysed Jo suojepaid se J josquos [esiGojo1g ul - pasn ae sjesul ewiog - Pp soysesedojss aie SOPBIGSUSAU] pseseasip ssneo yeuy sueBoyjed Jo - ASIOINAA JO S}SOY ayeIpausyu! Jo Arepuooes se joe Aeus seyeIgeeAU| — 7 hquaiouje eiowu os oun yONowLy ulesp Oo} Jeyem se[qeus Osi - Wut Bury speuue pure $3004 10 uaBAXo a1OWW SMOTE [LOS PS}EISE-SMA ~~ /payesse Ueag [Os Su] YIM Ynsed seyelqsveaut Buwoung —- winpuelowey -1 }2Pe1d ZL seoualng air