# Life Sciences Grade 11 Paper 2 NSC Prelim 2017 Paper & Memo > Grade 11 Life Sciences Paper 2 question paper and memo from the NSC Prelim Exam 2017, 20 pages. Read online or get the free PDF download. - Page: https://www.hlayiso.com/library/lfsc-p2-sept-qp-memo-2017-gr11/a13e2016-121f-447e-821c-5db6f5acec4e - Updated: 2026-09-27 - Subject: Life Sciences - Grade: Grade 11 - Document type: Question paper and memo - Year: 2017 - Exam period: NSC Prelim Exam - Paper: 2 - Curriculum: CAPS - Pages: 20 Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 11](https://www.hlayiso.com/library/grade-11) › [Life Sciences](https://www.hlayiso.com/library/grade-11/life-sciences) › [Life Sciences Grade 11 Paper 2 NSC Prelim 2017 Paper & Memo](https://www.hlayiso.com/library/lfsc-p2-sept-qp-memo-2017-gr11/a13e2016-121f-447e-821c-5db6f5acec4e) ## About this document Life Sciences · Grade 11 · NSC Prelim Exam · 2017. Question paper and memorandum, 20 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 Life Sciences/ P2 Final Examination November 2017 ~e C) [co education Department of Education REPUBLIC OF SOUTH AFRICA LIFE SCIENCES P2 — FINAL EXAMINATION NOVEMBER 2017 GRADE 11 EXAMINER: MRS J. RAMSEWAK (STANMORE SECONDARY SCHOOL) MODERATOR: MR N. BRAMDAW (MT EDGECOMBE PRIVATE SCHOOL) MARKS: 150 TIME: 2% HOURS N.B. This question paper consists of 12 pages. PLEASE TURN OVER ### Page 2 Life Sciences/ P2 Final Examination November 2017 INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. Answer ALL the questions. 2. Write ALL the answers in your ANSWER BOOK. 3. Start the answers to EACH question at the top of a NEW page. 4. Number the answers correctly according to the numbering system used in this question paper. 5. If answers are NOT presented according to the instructions of each question, candidates will lose marks. 6. All drawings should be done in pencil and labelled in blue or black ink. 7, Draw diagrams and flow charts ONLY when requested to do so. 8. The diagrams in this question paper may NOT necessarily be drawn to scale. 9. The use of graph paper is NOT permitted. 10. You may use a non-programmable calculator, protractor, and compass. 11. Write neatly and legibly. PLEASE TURN OVER ### Page 3 Life Sciences/ P2 Final Examination November 2017 SECTION A aN Nae C) QUESTION ONE 1.1, (i) (ii) (ii!) (iv) Various options are provided as possible answers to the following questions. Choose the correct answer and write only the letter (A-D) next to the question number (1.1.1. — 1.1.10.) in the ANSWER BOOK, for example, 1.1.11. D. . Bacteria are ... . _Unicellular and without a nucleus. Unicellular and parasitic in plants and animals. . Microscopic plants with a saprophytic mode of nutrition. . Unicellular with a nucleus and parasitic in plants and animals. . Viruses have a... Nucleic acid core and protein coat. DNA-containing nucleus and a lipid envelope. . Nucleic acid core and a plasma membrane. . DNA core and a protein coat. . The following is a list that describes viruses: Play a significant role as decomposers. Are the major pathogens of humans. Are parasites. Reproduce within host celis. Which of the following are of biological importance in viruses? A. B. c. D. 1.1.4, DOUrFH DOWD DOUSD (i); (ii) and (iil) (il); (ili) and (iv) (); (iii) and (iv) (ii) and (iv) Bryophytes are terrestrial plants that have NO ... Cellulose . Rhizoids . Vascular tissue . Sporophyte phase . The carpel (pistil) of a flower consists of the ... Anther, style and ovary . Stigma, filament and ovary . Anther, filament and ovary . Stigma, style and ovary Fertilization in Angiosperms occurs when ... The pollen tube grows down the style. Pollen moves from the anther to the stigma. . A sperm unites with an egg cell, The ovary enlarges into a fruit. PLEASE TURN OVER ### Page 4 Life Sciences/ P2 Final Examination November 2017 1.1.7. pomp> Angiosperms are classified as spermatophyte because they ... Produce flowers. Produce seeds. Are naked seeded plants. Produce cones. Fungi DO NOT play a role as ... Saprophytes Producers Parasites . Symbionts Which one of the following statements about Platyhelminthes is incorrect? They are diploblastic. They do not have a coelem. . They are bilaterally symmetrical. . They are parasitic. 1.1.10. Using natural resources so that they are not depleted. A. B. Cc, D. 1.2, 1.2.4. 1,2.2. 4.2.3. 1.2.4. 1.2.5. 1.2.6, Conservation Sustainable use Poaching Deforestation. 10x2 [20] Give the correct biological term for each of the following descriptions. Write only the term next to the question number (1.2.1. to 1.2.6.) in your ANSWER BOOKLET. The concentration of sense organs at the anterior end of an animal leading to the formation of a head. Places where seeds are stored to help preserve biodiversity. A fluid filled cavity lined with mesoderm. The type of alimentary canal which stretches from the mouth to the anus. The increase in concentration of nutrients in an aquatic ecosystem, which leads to algal boom. Measurement of the total amount of carbon dioxide emission of an individual, a defined population or a company per year. ; 1x6 [6] PLEASE TURN OVER 4 . # ### Page 5 Life Sciences/ P2 1.3. Final Examination November 2017 Match a statement from COLUMN II with the terms from COLUMN |, Write only the ~~ ‘ew? () correct LETTER next to the questions 1.3.1 ~ 1.3.5, in your ANSWER BOOKLET. COLUMN | COLUMN II . Vector and leaves. . A plant body that has no differentiations into roots, stems ._ Thallus . Has roots, stems and leaves. . Diploblastic . Anotochord is present in the adult form. _ Vertebrates . A body plan with two layers of cells. . Thermal pollution MolQm) > by it. An organism that carries a disease without being affected m Caused when water is released into a river after being heated by industries. G. Causes algal bloom. 1.4. 5x2 [10] Indicate whether each of the statements in COLUMN | applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II. Write A ONLY, B ONLY, BOTHA AND B or NONE next to the question number (1.4.1. to 1.4.7.), COLUMN | COLUMN II 1.4.1. Requires water to undergo sexual reproduction. . Angiosperms Pteridophytes 1.4.2. The part that is formed from a fertized ovule. Seed Fruit 14.3. The plant(s) where the gametophyte is dominant. Fern Gymnosperm 1.4.4, Unicellular organisms that can exist in coccus, spirillum and bacillus for form. w Pl >i >| > . Viruses Bacteria 1.4.5. Reduces the pest population by the introduction of its natural enemy. Biological control Chemical control 1.4.6. Examples of greenhouse gases. Carbon dioxide Methane 1.4.7. Factors affecting water availability. DPD riD> Destruction of wetlands Poor farming practices 7x2 [14] 50 MARKS] ~ PLEASE TURN OVER ### Page 6 Magnification: X20. 7] Life Sciences/ P2 Final Examination November 2017 QUESTION TWO 2.1. Flowers are reproductive structures used for sexual reproduction in angiosperm plants. Study the diagram below and answer the questions that follow. pac s — cammaaam aan ae A TY 2.1.1. Is this flower insect, wind, or bird pollinated? | : (1) 2.1.2. List TWO characteristics of this flower that make it well adapted for your answer given in QUESTION 2.1.1. * (2) [3] 2.2. Angiosperms are a group of plants that produce seeds by means of sexual reproduction. 2.2.1. Whatis the main advantage of sexual reproduction to plants? (1) 2.2.2. Aseed bank in Norway has been storing seeds of a rare and endangered plant. To keep the seeds fresh, 120 of the.seeds of this plant were selected to be grown. Out of these 120 seeds, only 90 germinated. What percentage of the seeds was not fertile? Show all your working. (2) 2.2.3. Explain how each of the following features of seeds is important for the plant's survival: a) Seeds can remain dormant for long periods of time. (1) b) Some seeds contain endosperm tissue. (1) [5] PLEASE TURN OVER ### Page 7 Life Sciences/ P2 Final Examination November 2017 2.3. Study the phylogenetic tree below, taking note of how the four plant divisions have a () evolved and answer the questions that follow. .....Phylegenetic tree showing plant evolution : i Moss Fern Gymnosperms Angiosperms ; | Naked seeds Frutt Enclosed seed Cones a . . Flower Pollen Non . Motile sperm Non-motile sperin : vascular . i ir f Seedless : Seed Root, stems; leaves ; ' Vascular Motile gametes Algae 2.3.1. What is the ancestral form of all the plant divisions shown? (1) 2.3.2. Which plant division is the best adapted to life on land? (1) 2.3.3. Which plants are the most closely related? (2) [4] PLEASE TURN OVER ### Page 8 Life Sciences/ P2 2.4. The table below shows the number of cases of tuberculosis (TB) and the number of deaths from TB around the world in 2009. Study the table and answer that questions that follow. TT Region Number of cases _| Number of deaths |! | Affica . ‘3.900. 1 430 1 | (America. = "350 - 20 _ (Europe. 560_ __ 62 ' South-East Asia _- 4900 480 Western Pacific _ 2900 240 | | | Eastern Mediterranean. 1 000 99 ay Global Total_ 14000 1300 2.4.1. Draw a BAR GRAPH using the data for each region in the table to show the number of deaths from TB in 2009. (6) 2.4.2, Calculate the percentage of cases in the Eastern Mediterranean. (2) 2.4.3, Why do you think that Europe and America have such a small number of cases of TB compared to the other countries in the table? Give ONE reason. (2) [10) 2.5. Study the diagram representing three animals and answer the questions that follow: Final Examination November 2017 . A B Cc . , _ Arthropoda Porifera Cnidaria — = and PLEASE TURN OVER 8 | ### Page 9 Life Sciences/ P2 Final Examination November 2017 a 2.5.1, State the type of symmetry of animal B. (1) 2.5.2. Which of the animal(s) (A, B or C) does not poses a through gut? (2) 2.5.3, State whether each of the organisms A and C are diploblastic or triploblastic? : (2) 2.5.4. Mention the type of symmetry, as it relates to each of the following animals, and explain how the symmetry is appropriate to the mode of life of: a) Organism A ; b) Organism C 2X3 (6) [11] 2.6. Read the passage and study the graph. Accumulation of greenhouse gases in the atmosphere changes the climate melting glaciers, rising sea levels and new and more frequent weather extremes will change the entire world. Water supplies are decreasing, crop yields are dropping, forests are burning and our oceans are becoming more acidic. Climate change scientists warn that if we do not reduce our greenhouse gas emissions, average global temperatures could increase by 4°C or more by the year 2100”...with frightening implications. [ Changes in CO; levels in the atmosphere from’ 2006 to 2017 405 $ - 400 Z| EI _~ -— 395 LA. A 390 ¢ — 2 385 A é 4 8 380 a | 875 2006 2008 2010 2012 2014 2016 2.6.1. Write ONE phrase from the passage that indicates that climate change affects the following: . . a) Food security (1) b) Water availability (1) 2.6.2. From the graph, state the COs level in the atmosphere in 2013. (2) 2.6.3, Describe how the destruction of forests by humans contributes to global warming. ~ (3) (7] GoMARKS] PLEASE TURN OVER 3 | ### Page 10 Life Sciences/ P2 Final Examination November 2017 | QUESTION THREE A certain community living close to an industrial area witnessed the unexplained death of many fish and other aquatic organisms in the nearby river. Many members of the. community accused the local chemical-factory of disposing untreated acid containing | effluent into the river. This incident triggered an investigation by learners at nearby school. | ‘The leatners were instructed to monitor and record pH levels of two different sites A and B ag indicated in the site diagram below, on a daily basis, for three weeks. c Factory site | THE RIVER fe | Suspected 1 | ee {| untreated i | effluent 1. { disposal | A summary of the recorded data is below. Study the information below and answer the questions that follow. vl pu of water at Site A pH of water at Site B Week 1 6.5 4 Week 2 6,8 3,5 Week 3 64 3,2 3.1.1. State the aim of the above investigation. , (2) 3.1.2. State a hypothesis for the investigation. . (2) 3.1.3. Mention any TWO steps to be considered when planning this investigation. (2) 3.1.4. Provide a reason for also testing the pH of water at Site A. (2) 3.1.5. State ONE WAY in which this investigation can be made more reliable. (2) [10] PLEASE TURN OVER ### Page 11 Life Sciences/ P2 : Final Examination November 2017 3.2. Study the graph below, which shows the body’s response to a vaccination given by () The amount of antibodies in an injection and a booster injection. Answer the questions that follow. mn | Primary and Secondary responses to an injection containing dead or weakened germs D 4 fhe serum / antibody units Cc 4 B rf J. \ J. 1 tL t. tL A 40 80 420 = 180 200 = 240 280 A= First infection | B = Second injection ‘Time after immunisation / days 3.2.1 Mention ONE common ways of receiving vaccines. (2) 3.2.2 What in the vaccination stimulated the body to make antibodies? (2) 3.2.3 Which cells in the immune system produce the antibodies? (2) 3.2.4 What happened to the antibody level after the first injection? (2) 3.2.5 What happened to the antibody level after the second injection? (2) [10] 3.3. Read through the text below and answer the questions that follow. — Cape Towns landfill crisis Approximately 6 000 tons of waste are currently generated daily within the City of Cape Town. Fifty-five percent of waste ending up at the Council’s six landfill sites is directly received from the industrial and commercial sectors, whereas the domestic waste from households account for approximately 30% of the waste stream. A total of 1,7 million tons of waste was received in landfill sites in Cape Town during 2002 compared to the 1,6 million tons in 2001 and the 1,5 million tons in 2000. This is roughly an annual increase of 7%. Waste from lower income households are shown to contain about 80% organic waste compared to that from affluent suburbs, which typically contains about 60-70% of packaging waste. Of the total amount of waste produced, more than 90% is landfilled by the City of Cape Town, PLEASE TURN OVER ### Page 12 Life Sciences/ P2 Final Examination November 2017 There is an urgent need for a new regional landfill site as the city faces the closure of most of its current landfill sites. Clean-up costs of litter and dumping exceed R100 million ayear. This is money that could be put to far greater use within the city, particularly given the housing crisis. [Adapted from: www.capetown.gov.za/en/SolidWaste] | 3.3.1 Calculate how many tons of domestic waste are produced per day. Show all calculations. (3) 3.3.2 Suggest ONE reason for the increase in solid waste in the city landfill site. (2) . 3.3.3 Landfills are known to cause pollution to the environment. Briefly describe TWO possible "ways in which this could happen. (4) 3.3.4 Give ONE way in which lower income households could reduce thie amount of waste that they send to landfills. (1) \ ) 3.3.5 Explain how poor management of landfill sites can affect the water quality in a city. (2) [12] 3.4, Water shortage in Cape Town have reached crisis levels. If you were the Minister of Water Affairs, explain FOUR strategies you could use to ensure that the city of Cape Town copes with the water crisis. , [8] | SECTION: C QUESTION FOUR Describe how habitat loss through various human activities may lead to a loss of biodiversity. Content : 17 Synthesis: 3 [20] NOTE: No marks will be awarded for answers in the form of flow charts, tables and diagrams. GRAND TOTAL: 150] PLEASE TURN OVER '¢ ### Page 13 Life Sciences/ P2 Final Examination November 2017 () ) education Department of Education REPUBLIC OF SOUTH AFRICA Se A Se A NS a a a et a ~ LIFE SCIENCES P2_ FINAL EXAMINATION ~ NOVEMBER 2017 GRADE 11 EXAMINER: MRS J. RAMSEWAK (STANMORE SECONDARY SCHOOL) | MODERATOR: MR N. BRAMDAW (MT EDGECOMBE PRIVATE SCHOOL) MARKS: 150 TIME: 2% HOURS N.B. This question paper consists of 7 pages. PLEASE TURN OVER ### Page 14 ~ Grade: 11 Paper 2 2017 Memorandum _||SECTION: A 1.14.1. Av 1.1.2. Avy 1.1.3. By 114. Cv 1.1.5. Dv 1.1.6. CyV - 14.7. BY » 4.1.8. BY , 14.9. AW 4.4.10. BYY 2x10 “| 1.2.1. cephalization ¥ 1.2.2. Seed Banks¥ 1.2.3, coglomy © | 1.2.4, through guty 1.2.5. eutrificationy 1.2.6. carbon footprint ¥ 6x1 | 1.3.1. EW 1.3.2. Avy 1.3.3. DVvV 1.3.4. CW 1.3.5. Fvv 2x5 (10) 4.4.1. Bonly VW 1.4.5. Aonlyvy ( © 1.4.2. Aoniy 1.4.6. Both A and Bvy 1.4.3. None vV¥ 1.4.7, Both Aand BY 1.4.4, Bo onlyvy 2x7 (14) [50 MARKS] ### Page 15 SECTION: B “| QUESTION TWO 2.1.1. Wind.V 2.1.2. Small flowers without colourful petals¥ ¢ Produces large amounts of pollen to increase chance of pollinationy e Pollen grains are light, smooth and dry to allow them to float.V e Anthers are attached to filament in such a way that they are easily movable with windy * — Stigma is large, feathery and sticky to trap as much pollen as possible.¥ e Large anthers.V Any2 2X1(2)V . It generates genetic variety.V : (1) . 120 — 90 = 30 30/120 x 100/1V = 25%V (2) 2.2.3. a) They can survive unfavourable periods.¥ (1) b) Provides food for the growing embryo V until the plant starts to make food by photosynthesis(1 2.3.1. Algae.¥ (1) 2.3.2. AngiospermsV (1) 2.3.3. Gymnosperms and Angiosperms:v¥, (must have both together to get 2 v1) 2.4.1. v__ Number of deaths due to TB in different regions - |s00™ of the world ~ ~ 480 °°? 30 vn) wo | 400 Ww 5 300 + 240 #200 4 = 400 + z Io 0+ Sen Se re & Ss se fy * : ra ' s s | - wg Regions ### Page 16 Guideline for the assessing of the graph Correct type of graph Title of graph Correct label and scale of x- axes Correct label and scale of y- 1 axes Plotting of points : 1: 1 to 3 points plotted correctly 2: all 6 points plotted correctly NOTE: if the wrong type of graph is drawn, 3 marks will be lost for: « ‘Correct type of graph ¢ ‘Plotting of points’ If labels of the axes are transposed then 2 marks will be lost for: * ‘Correct label and scale for X-axis and Y-axis’ _. (6) 2.4.2. 1000/14000 x 100/1V =71%7 They are well developed countries VV Low level of povertyvW/ well off/ good health and social infrastructure. More people are well nourishedyW/did not live in crowded/ dirty/unhygienic conditions. Well educated about the diseasevV Any 1 1x2 (2) B- Asymmetricaly (1)| B Vand Cy (2) A- Triploblastic ¥ C. diploblastic ¥ ; (2) a) bilateral symmetry Leads to cephalizationy As soon as the organism enters into a new environment it can sense ( , danger and detect food.¥ (3) b) Radial symmetryY Can sense food and dangerv equally well from all directionsV especially because of their sedentary nature. ; (3) ### Page 17 2.6.1. a) Crop yields are dropping. b) Water supplies are decreasingv 2.6.2, 395 parts per milliony 2.6.3. There will be less trees/no trees So that less carbon dioxide will be used from the atmospherey for photosynthesis Carbon dioxide will accumulate in the atmosphere, leading to enhanced greenhouse effect Which will cause global warming. Any 3 3x1(3) ### Page 18 QUESTIONTHREE 3.1.1. To compare the pH at two sites A and BY before and after effluent disposal 3.1.2. The ph of water at Site B (after effluent disposal)y will be lower than that at Site A.(Any other)(2) ) 3.1.3. Formulate a hypothesis for testingV Seek expert advice from relevant peopley Decide on a suitable site for samplingY Organise all the required chemicals and: equipment before the start of the sampling process Design a relevant recording sheet Obtain permission to enter the area if it is requiredy Organise protective clothing such as gloves and boots.¥ Decide on the volume of daily samples/ Depth at which samples are collected/ and the time of sample taken¥ Any2¥ 2X1 (2) re) To compare the variations of ph at Site BV (2) . Sample A is used as a controly . Repeat the investigationy or Take more samples at each sitey 3.2.1. injectionvy 3.2.2. Dead or weakened germsvV 3.2.3. white blood cells/ T- lymphocytesvY 3.2.4. It increases slowly to about day 50’ where it is at its highest and then it decreasesY ¢ 3.2.5. It increases rapidly in the first 30 days/ +- day 140to its maximum, then levels off and stayed (2) constanty until up to over 280 days. 3.3.1. 30/1007 x 60007 = 1800V tons 3.3.2. Increase in population produces more solid wastev¥ People more well off, purchasing more goods/ food.vV ### Page 19 b—]-.e There-could-be tittering V when wind blows plastic bags/paper into surrounding areas¥ ¢ The ground water could be polluted¥ when leaching takes placev ¢ Air pollution occursV when waste is burnt/ incinerated * Air pollution occursV¥ when methane gas is given off at the dumpsy¥ Any2 = 2x2(4) 3.3.4. They could have compost heaps and not throw away organic wastes. They can recycle goods. Any1 — 1x1(1) 3.3.5. If an impermeable layer (plastic) is not laid down before dumping,V leachate could contaminate ground water, causing it to be polluted. (2) 3.4. Fix leaking pipes/ toilets/ taps To reduce wastage of waterv e Provide incentives to families to save watery To encourage sustained use of watery * Reduce pressure in pipes To reduce wastage of water\ ¢ Provide education to peoplev On wise use of watery ¢ Encourage good farming practices To prevent contamination of water sources by fertilizers and pesticidesV e Use boreholes/ tanks ¥ To increase water availabilityy e Prevent destruction of wetlandsy To improve the availability and quality of water () ¢ Desalinate sea watery To make more water availabley e Remove alien trees¥ Because it takes up a lot of watery e Recycling of grey waterv To conserve watery « Impose fines for overuse of water’ To reduce water wastage (Mark first 4 only) 4X2 (8) 40 MARKS] ### Page 20 SECTION: C QUESTION FOUR ASSESSNG THE PRESENTATION OF THE ESSAY ‘ ( As a result of urbanisationy land is cleared for housing’ industries and roads leading to loss of habitat for animals/ insects causing loss of biodiversity. Monoculturey many species of indigenous vegetation and animals are removedy for the purpose of planting crop of a single species Disrupts predator- prey relationships V/ Food chains are broken Uniform flora attracts only a few species of animals¥: The lack of variety of plants and animals may lead to rapid increases in pest populationsY As a result of overgrazing’ loss of topsoil/erosion increases Decreasing, soil fertility decreasing the potential of plant lifey When pesticides are used to kill pestsy the chemicats enter the ground waterv and may affect plant life in the area.V ¢ } When fertilizers are added to soil + it may be washed into riversV causing algal bloomy which eventually leads to a depletion of oxygen in the watery making it difficult to sustain lifey As a result of miningY The pH of water may be affectedy and toxic gases may be emitted into the atmospherev the environment is altered such that organisms can no longer exist in the areay- An increase in deforestation’ as a result of the demand for wood products destroys the ecosystems within the forest areaV Destructions of wetlands and grasslandsY To make way for agriculturey / human inhabitation, reduces the biodiversity of organisms living on wetlands and grasslands Content (Any 17 ¥ 3 Relevance : Logical sequence | Comprehensive — Synthesis All information provided Is Ideas arranged in alogical/cause- . | Answered all aspecis Total 20 relevant to the topic effect sequence - required bythe essay fl | Only information relating to loss | Effects on the habitat are Atleast five causes of : feo MARKS] of biodiversity through habitat appropriately linked to the cause habitat destruction should ‘ destruction is provided ~~ be fully described (6 x 2 = (There Is no Irrelevant a : 40 marks). - Information) . . : 4 mark 4_mark. : ‘_i mark. 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