# Life Sciences Grade 12 KZN March 2015 Paper & Memo > Grade 12 Life Sciences question paper and memo from the KZN March 2015, 12 pages. Read online or get the free PDF download. - Page: https://www.hlayiso.com/library/life-sc-march-qp-and-memo-2015-gr12/2f3ac44e-e571-415d-bfb3-6ba6bd29600a - Updated: 2026-09-27 - Subject: Life Sciences - Grade: Grade 12 - Document type: Question paper and memo - Year: 2015 - Exam period: KZN March - Curriculum: CAPS - Pages: 12 Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 12](https://www.hlayiso.com/library/grade-12) › [Life Sciences](https://www.hlayiso.com/library/grade-12/life-sciences) › [Life Sciences Grade 12 KZN March 2015 Paper & Memo](https://www.hlayiso.com/library/life-sc-march-qp-and-memo-2015-gr12/2f3ac44e-e571-415d-bfb3-6ba6bd29600a) ## About this document Life Sciences · Grade 12 · KZN March · 2015. Question paper and memorandum, 12 pages. Read online or download the PDF. Read it free online on the page above; download the PDF from there. ## Document text Text extracted from the PDF. Layout, diagrams and tables may not survive extraction. ### Page 1 Basic Education KwaZulu-Natal Department of Basic Education REPUBLIC OF SOUTH AFRICA A LIFESCIENCES tsi‘ cy : oo : : : on 1 s 7 r " oS _ COMMONTEST ot | * = MARCH2015 GE () “edednbhaedeeeabeedeewnadesdendeeieeeennenenee? NATIONAL SENIOR CERTIFICATE 5) MARKS: 60 | TIME: 1 hour This question paper consists of 9 pages. Copyright reserved Please turn over ET ETE ### Page 2 Life Sciences Downloaded from hlayiso.com 2 Common Test March 2015 _NSC 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 label 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. a compass where necessary. Write neatly and legibly. Copyright reserved Please turn over ### Page 3 CO) Life Sciences SECTIONA QUESTION 1 Downloaded from hlayiso.com 3 NSC Various possible options are provided as answers to the following questions. Choose the correct answer and write only the letter (A - D) next to the question number (1.1.1 - 1.1.5) in the answer book, for e.g. 1.1.6 D. 1.4 1.2 1.3 Copyright reserved The process of gametogenesis in human males and females is different in that ... A_ meiosis does not take place in males. B_ sperm cells are formed by mitosis while ova are formed by meiosis. Call the cells formed in males become sperm cells but only one cell becomes the ovum in females. D_ sperm cells are haploid whereas the ovum is diploid. Study the steps below representing a process in males. i, Immature sperm are stored in the epididymis ii. | Spermatogenesis occurs iii. As sperm move along the sperm duct, fluids are added from glands iv. Semen passes along the urethra out of the body Which ONE of the following combinations represents the correct steps in the production of semen in males? A i, ii, ili, iv Bi, iii, i, iv Ci, i, iii, iv D_ iii, ii, iv, i Which ONE of the following statements about the hormones FSH and LH is correct? A As the level of FSH increases, the level of LH decreases B_ FSH inhibits LH C FSH is produced by the pituitary gland and LH is produced by the corpus luteum D Both hormones reach a maximum level around the time of ovulation Please turn over Common Test March 2015 ### Page 4 Downloaded from hlayiso.com Life Sciences Common Test March 2015 NSC 1.4 The graph below shows the differences in the chances of conception per month in women between the ages of 22 years and 48 years. 30: 25. 207 15 Chance of conception per month (%) Age in years -{/roa-online.com/ivffindex. php? Female-Infertility-34 What is the difference in the chance of conception per month between a woman that is 43 years old and one that is 36 years old? A 20 % B 10 % Cc 5% D 15% Copyright reserved Please turn over ### Page 5 Life Sciences 1.5 Copyright reserved Downloaded from hlayiso.com 5 Common Test March 2015 NSC Study the graph below that shows the density of mucus in the cervix during the uterine cycle. Thickness of mucus (arbitrary units) o - 8 G&G FB & Density of mucus in the cervix during the uterine cycle ovulation, — 10 18 36 35 36 Time (days) ot A reasonable conclusion that can be made from the information in the graph above is that ... A B Cc D the mucus in the cervix is thinnest around the time of ovulation. the thickness of the mucus does not change during the uterine cycle. the thickness of the mucus is controlled by hormones. mucus in the cervix promotes implantation. TOTAL QUESTION 1: 10 TOTAL SECTION A: 10 Please turn over ### Page 6 Downloaded from hlayiso.com Life Sciences Common Test March 2015 NSC SECTION B QUESTION 2 2.1 The diagram below represents a cell undergoing meiosis. The graph shows the DNA content of three samples of cells. DNA content (ny a Now oo» = | | Sample http://www.easynotecards.com/notecard set/7760 2.1.1 Identify the structures labelled A and B. (2) 2.1.2 Name the phase of meiosis shown in the diagram. (1) 2.1.3. Give ONE observable reason for your answer to QUESTION 2.1.2. (1) 2.1.4 How many chromosomes will be present in the cell at the: (a) Beginning of prophase | (1) (b) End of meiosis II (1) 2.1.5 State whether the cell undergoing meiosis was taken from sample I, Hor fon the graph. (1) 2.1.6 Give an explanation for your answer to QUESTION 2.1.5. (2) (9) Copyright reserved Please turn over ### Page 7 Life Sciences Downloaded from hlayiso.com 7 NSC Common Test March 2015 2.2 The diagrams below represent chicks that are three hours old. Copyright reserved 2.2.1 2.2.2 2.2.3 2.2.4 Chick A Chick B Both sets of parents of the chicks in the above diagram lay eggs. Give the correct term for this type of reproductive strategy. (1) Which chick (A or B) represents precocial development? (1) State TWO ways in which the chick identified in QUESTION 2.2.2 will be different from the chick that has altricial development. (2) “Precocial development requires fertilization to be internal.” List TWO advantages of internal fertilization for organisms living on land. (2) (6) TOTAL QUESTION 2 (18) Please turn over ### Page 8 ‘ Life Sciences ‘QUESTION 3 Sopyright reserved Downloaded from hlayiso.com Common Test March 2015 NSC The diagram below represents a part of the reproductive process in humans. Which LETTER on the above diagram represents the process of: (a) Fertilization (b) Implantation Give the correct term for the cell labelled A. Describe the changes that occur in ceil A until it forms a blastula / blastocyst. Name the structure that will form at D after the release of structure labelled C. Give ONE function of the structure named in QUESTION 3.1.4. (1) (1) (1) (4) (1) (1) (9) Please turn over ### Page 9 Downloaded from hlayiso.com 9 Life Sciences Common Test March 2015 | | NSC 3.2 Study the graph below. Ovulation . 5 ; H pS} H : ~ a © s ; : 2 i ; Dm | a ‘ oc a ca 65 ‘ ; o> ‘ a g § : aX ES : 28 i Y t 14 28 4 i 3.2.1 Identify hormones X and Y. (2) | 3.2.2 Explain the changes in level of hormone Y between day 14 and day 28. (4) | (6) | TOTAL QUESTION 2: (15) | SECTION C | QUESTION 4 C) A gene consists of DNA which codes for a particular protein. When a gene mutation ~ occurs, it changes the base sequence on the DNA molecule, affecting protein synthesis. Describe the process of protein synthesis and explain how this process may be affected by a gene mutation. NOTE: NO marks will be awarded for answers in the form of flow charts or diagrams. Content: (17) Synthesis: (3) TOTAL QUESTION 4: (20) TOTAL SECTION C: (20)| GRAND TOTAL: 60 Copyright reserved ### Page 10 Downloaded from hlayiso.com ### Page 11 (su) @ ¢ NOLLSAND WLOL zc Auy Aquo OfAL 3514 YE / 25b9 [ejuaued Jo serBap awos 10} smoy - 7 peonpaid Buudsyoseme4 - / UOREZIIIL9} Jo BoUeYD Seseaiou] - 7 uoRepeid Woy payajoid ere uuedsy wnag - MOTO} 0} YJed uo aney Ajuo wads) ple}em jo Apog afie] & ut Jsoj, 3@6 jouues uueds - ino Ap you op wnagjwuedg = - = A66e 94; 0} WIMS 0} Jayem paau yuopuuedg - ara ° @ z Auy AlUo OML 1S1u EW (6) 7 Soka sy usd - . / te6uep woy adessy ~- {o} / SOS! psa - 7) AUMO SHUG BACYY - ad “Of sige 8q Wm pag Bunok ayy g'zz 2 (0) sa 2Zz a) { i skiedag Ze Zz = (2) leo au} UL AYN Jo junowe atg Buygnop — Ss 7 1189 piojdip & ul coed yoo) uoReaydal yNq — OLZ fo) (py Albeidues go 1z Ew +o @ w 78 (e) vLe S Auo 3NO 354y sey oO @) 1 Auy / Pauapoys Bulag ae seiqy apuidg - xe} 189 8u} 40 sajod ay!soddo 0} paynd Bulag are o ‘SewosoWOsYo / » payeredes Bulag are S@WOsOWOIYS snoBojoWoH - eV~e Ow sleseydeuy ZZ — a) aWosoqUED / paloUTLIED - g = ABUOSOWOID- Yo EEZ PZ Z@NOLSAND fe) ‘NOLS OQ (oF) VNOLLO3S TvLOL (ol) LNOLLSSND TWLOL (on) AM SL AcE VL AAG EL AAO TL AAO VE L + NOLLSSnND Ouray SLOZ yore; }sa1 UoWLUOD zt S@0USDS ey) : — “seed y 40 sysisuoo wnpueowoU SIL | ameu} -BINLL 08 ‘SHYVN ALVSISILYAD YOINSS “IWNOLLYN S102 HOUVIN 1S31 NOIWWOS ge eeRR RRR BERBERS SHONZIOS 34m “ a ### Page 12 . ed [os] *TWLOL GNVED {oz) +9 NOLLOSS WLOL (oz) + NOLLSAND TVLOL (e) sisauguks va) queyog v t t eM ‘suoREA ouBE = "pedse pue uoneisuer - pea ulijim eouanbes: (voneuuoju weneient “uonduosuey - teoiGo] @ uLpapnjour | ou si ey) “papnjou ve “swadse Bumoyoy ue uoRe;nW aueGe | — uopEInus auAB eso saeO ayj J0 Yes UO pepnpui | jo Saye oj pue sjsauyuXs ‘uy pue sisayjuds upsjosd Aessa ase sjulod JAYH.L 1se9| TW Uurejord Jo sjuane ay | 0} ]UBASIas LOQeUOU ALC stu uy essesppe ‘auenbas ‘Aquarowns ueeq aney Aessa 9th Aq pauinbau syoedse ity Peys-esneojediboy ado} uy 0} jUEASjeL © u pebuenue aie seep | Si pepiaosd uonetuoj ity | AlneseueS) ‘) sAsuaysidmog () eauenbas 1es1507 (uy aquencjoy uoHeyS SIS@URLIAS 40} SIN () / apeut ursyoid so ed ay) BuiBueyp sous} - . 7 Spe oujwe jo eauanbes ayy Guibueyg = - PUES VNYW Su} 0} JUBNOId Bq {Wm » pide OUWE JUSTEUIp e YUM WN} - 7 @Bueyp [JJM SUOPOS YNAW - uoReINy eusg () ghuy Sauzue oytoads Aq paljoyjuco si ssaaoid ey, - suiajoid pesnbes oy wo} 0} - Spuog apyded Aq payseye suicsaq spioe oul - “eWOSOqL 84j 0} pppe oUlWe pauinbal sty SBuLg YNEA UeYy - AYNUW 84} UO UOpeD ay} 0} AvejUaWa|dwiOS sysayoyeuU- WING} 8u} UO UOpooqUe au; ey pve oulwe oyads e seweo YNYIUOey - 7 uogessues, () 2 Auy @wiosoqu: Su} OF SOUOEHE / pUuse|doyO at} 0} snajpnu yy Woy SEAOW YNYW eUL /SIS@UUAS Uie301d 410) aBessaw papoo ayy sey MOU YNYW O-O PUR N-Wi_AVNG 8tp 0} Areyrewejdiuics si yn eu L uisejdosjonu ay] woy ,sepyoepnu YNY eeu Guise) AVNYW WO} OL /ajejduts} & Se pasn si pues auQ . a@yesedas ‘SPUERS OM) BLY / AYEOIG SPUEL}S OM} BY] LeeMjeq Spuog UeBospAy syy usu - /Sdizun YN pepueRs-aqnop au, - 7 vonduosued | ‘sdajs omy Ul sind90 sseloud SIL rere Downloaded from hlayiso.com ¥ NOLLSSNO 3 NOLLOAS oweN, SLOZ YEW JSe4 UOWWOD ¢ seouang ayy (Si) *€ NOLLSAND WLOL (9) () Uogenysuey Joy Bumoye /_» eoeld Bupje} Jou UoREZIILIe} 0} enp Aiqeqaud - / Sdolp janaj aucsajsaBolg - 8 — 1z keg / peziigiay aq Aew winac paseajai ay} souls - AoueuBaid e 103 aredaud 0} sasii jana] QuCsO|SEBO1g - te-v1 keq @) / sualaysaBoud - 4 7 uafiaysao - x (6) G) ,euo1aysaGod sayaioag @) Auneyny sndiog, ) 7 huy yshooyselg / BIN|SeIQ e paleo AAAeD MO!IOY B YIM SIjeo JO SseUI e SULIOL PUE ApIAIp Oo} senUgUOD BINIOW ayy - /BINUOW B payed - APAULO} SI S1}90 Jo [eq B yun - Sisoyw ssofiepun s}oBAZ at - () (peyoBKZ () sa@ () 7a () owsy GLOZ Yuey] Jse] UOWWOD € tte Vee ce ax eve cre Pre VE € NOLLSSNOD SeOUaDS eI] ## Related documents - [LIFE SCIENCES P2 GR12 MEMO SEPT2015 Afr (final)](https://www.hlayiso.com/library/life-sciences-p2-gr12-memo-sept2015-afr-final/ba98751d-3865-44f0-a283-45a85ee22b81) — Life Sciences · Memo · 2015 · Afr - [Grade 12 NSC Life Sciences P1 (Afrikaans) 2015 Preparatory Examination Possible Answers](https://www.hlayiso.com/library/grade-12-nsc-life-sciences-p1-afrikaans-2015-preparatory-examination-possible-answers/846bf94c-4e3c-4745-a5fe-37416d2bc053) — Life Sciences · Memo · 2015 · Afr - [Grade 12 NSC Life Sciences P2 (Afrikaans) 2015 Preparatory Examination Question Paper](https://www.hlayiso.com/library/grade-12-nsc-life-sciences-p2-afrikaans-2015-preparatory-examination-question-paper/82f3d670-5978-4924-921a-4e1431048e3f) — Life Sciences · QP · 2015 · Afr - [Life Sciences P2 June July 2015 Memo Afr](https://www.hlayiso.com/library/life-sciences-p2-june-july-2015-memo-afr/b8da6f77-a4a9-4f20-be34-bdd1488cd2b7) — Life Sciences · Memo · 2015 · Afr - [Life Sciences P2 June July 2015 Memo Eng](https://www.hlayiso.com/library/life-sciences-p2-june-july-2015-memo-eng/d6c0abd7-6ef8-46e2-b6c1-5f8388545390) — Life Sciences · Memo · 2015 · Eng - [Life Sciences P1 Nov 2015 Eng](https://www.hlayiso.com/library/life-sciences-p1-nov-2015-eng/7dd0fbbe-9034-4c26-b59e-2b3065a119d0) — Life Sciences · QP · 2015 · Eng ## More from Grade 12 Life Sciences - [Life Sciences Grade 12 NSC P2 MEMO September 2025 Free State](https://www.hlayiso.com/library/life-sciences-grade-12-nsc-p2-memo-september-2025-free-state/470ae841-15a4-4ab3-a87b-abd2294edc20) — Memo · 2025 - [Life Sciences Grade 12 NSC P2 MEMO September 2025 Gauteng](https://www.hlayiso.com/library/life-sciences-grade-12-nsc-p2-memo-september-2025-gauteng/bbdf9d27-c483-4cd4-af9f-287e699f482e) — Memo · 2025 - [Life Sciences Grade 12 NSC QP March 2025 KZN](https://www.hlayiso.com/library/life-sciences-grade-12-nsc-qp-march-2025-kzn/b1598f8e-58e0-4c09-b513-b9f61ae73c47) — QP · 2025 - [Life Sciences Grade 12 NSC P2 MEMO September 2025 KZN](https://www.hlayiso.com/library/life-sciences-grade-12-nsc-p2-memo-september-2025-kzn/f412416e-57d1-473d-886a-87c9fbb8823c) — Memo · 2025 - [Life Sciences Grade 12 NSC P2 MEMO September 2025 Mpumalanga](https://www.hlayiso.com/library/life-sciences-grade-12-nsc-p2-memo-september-2025-mpumalanga/17b4cc42-641c-4d7d-9c53-6bac113ce83c) — Memo · 2025 - [Life Sciences Grade 12 NSC P1 QP September 2025 Mpumalanga](https://www.hlayiso.com/library/life-sciences-grade-12-nsc-p1-qp-september-2025-mpumalanga/be917127-6071-4190-b900-3c475d5bfdd4) — QP · 2025 ## Collection - [Grade 12 past papers](https://www.hlayiso.com/grade-12/past-papers) --- Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. When citing, link the page URL above, not a PDF or /api/ URL.