Life Sciences Grade 11 P3 September Test 2018 Paper & Memo

Downloaded from hlayiso.com Basic Education KwaZulu-Natal Department of Basic Education REPUBLIC OF SOUTH AFRICA GREENBURY SECONDARY SCHOOL c DEPARTMENT OF MATHS & SCIENCES: LIFE SCIENCES & HO.D. MR L PILLAY Grade 11 (feb bem PAPER 3 - PRACTICAL TEST - 2018 ; MARKS: 60 TIME: 60 minutes INSTRUCTIONS: 1. This paper consists of 6 pages. 2. Answer ALL questions in the spaces provided. 3. Write neatly. 4. Drawings must be done in pencil and labelled in ink. Question 1: HANDLING EQUIPMENT, FOLLOWING INSTRUCTIONS, OBSERVING, DRAWING al PLANT STUDY Observe the FOUR plants (A, B, C and D) in front of you, and answer the questions below. 1.1.1 Write ONLY the LETTER representing the plant in the appropriate space. a) The plant that bears naked seeds b) The plant with a rhizome c) A gametophyte plant d) A plant that bears fruit _ (4) 4.2 You are provided with the following equipment/apparatus: A flower specimen Forceps Microscope Dissecting needles Scalpel A slide Petri dish Cellotape You are required to: i) view the specimen under the microscope ii) dissect and remove the male and female reproductive structures 1.2.1. Handling of equipment: 1.2.2 Clarity of specimen [| (2) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences 2 Test: paper 3 - 2018 NSC — Grade 11 1.2.3 Separate the male and female reproductive structures and paste them in the appropriate spaces below, using the cellotape provided. | Male Reproductive Structure Female Reproductive Structure (2) 1.2.4 Draw a neat labelled diagram of the male reproductive structure in the space below: (4) 1.2.5 Name the pollinating agent for this flower. (1) 1.2.6 Give TWO reasons for your answer. _ (2) (15) 2. Question Two: RECORD OBSERVATIONS, SELECTING APPARATUS, HYPOTHESISING 2.1 The diagram below represents an investigation, and is exactly like the apparatus set up in front of you. After a period of 24 hours red hydrogen carbonate indicator was added to each to each test tube. Hint: Hydrogen carbonate indicator is used to show changes in carbon dioxide concentration as follows: e It turns from red to purple when the carbon dioxide level decreases. e It turns from red to yellow when the carbon dioxide levels increases. A B “water Testitubes A. Band C in darkness Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences 3 Test: paper 3 - 2018 NSC - Grade 11 2.1.1 State the AIM for the investigation. 2.1.2 Tabulate the results that will be observed in test tubes A, B and C. 2.1.3 Explain the purpose of test tube A. 2.1.4 List TWO ways in which the process taking place in test tube C is of biological importance. 2.2 You are given the following equipment and apparatus. 2 test tubes of the same size 2 water plants of the same species and the same size Water for the test tubes A beaker to use as a water bath, with some warm water A thermometer A lamp Some foil Hydrogen carbonate indicator eoeoeesxseee Describe the METHOD (in steps) how you will use these to set up an investigation to demonstrate that light is a factor that affects the rate of photosynthesis. (4) (15) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences 4 Test: paper 3 - 2018 NSC — Grade 11 3. Question Three: DRAWING GRAPH, MEASURING, CALCULATING 3.1 The MODEL set up in front of you is similar to the one in the diagram below. y-shaped glass tube ——-— glass bell jar plastic sheeting Bell-jar_ Apparatus 3.1.1 Name the process that this model demonstrate. 3.1.2 What do each of the following parts in the model represent in the human: a) the Y-shaped tube/straw b) the plastic sheeting 3.1.3 a) Your teacher will pull downwards on the plastic sheeting. State the result b) Name this process. 3.1.4 Explain how the glass bell jar of the model is limited in demonstrating the actual human system. 3.2 The TABLE below shows the percentage of carbon dioxide (COz) emitted by different sectors in a certain city in South Africa. SECTOR CO2 EMISSION a (%) __ Transport 25 Residential 27 Industrial | _ 15 Commercial 28. other 5 3.2.1 Draw a pie chart, on the next page, to represent the data in the table. Show ALL calculations. Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences 5 Test: paper 3 - 2018 NSC = Grade 11 3.2.2 Describe how an increase in the CO2 concentration can lead to global warming. (3) — (15) 4. Question Four: MAKE OBSERVATIONS/ ANALYSE/ INTERPRET DATA 41 Observe the dissected specimen of an organ. Provide the label (A, B, C or D) for each of the following descriptions. a) Region where Malpighian bodies are situated b) Collects the urine from pyramids c) Awide portion leading to the ureters d) A collection of collecting tubes, forming ducts of Bellini 4.2 The TABLE below shows the following: “* The amount of each substance filtered daily from the blood into the Bowman's capsule. “* The amount of each substance which is present in a day’s urine output. Substrate | Filtrate Urine Water 180 litres 1,5 litres Salts 500 g 15g Glucose 200 g Og urea 40g 422 4.2.1 Give ONE reason for 200g glucose in the filtrate and none in the urine. - (1) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences 6 NSC - Grade 11 4.2.2 Calculate the percentage of filtered salt which are reabsorbed. Show calculations. 4.2.3 Explain why the urea concentration is higher in the urine than in the filtrate. 4.2.4 Give ONE reason why water is passively reabsorbed at the proximal convoluted tubule. 4.3 Some people with type | diabetes cannot produce insulin and therefore need to inject themselves regularly (insulin-dependent). An investigation was done to determine the action of two types of insulin (A and B). The glucose uptake rate of cells, when using each type of insulin, was measured over time. Test: paper 3 - 2018 Glucose uptake under the influence of Insulin A and Insulin B in 24 hours S 8 x 7 B 6 ao 5 £ 4 at j @ E 3 = Insulin A £ Eg — Insulin B 5 1 | g 0 5 10 15 20 26 (a) Time (hours) [Adapted from www.webmed.com 4.3.1 Name the organ that produces insulin. 4.3.2 Using the information in the graph, state TWO differences in the functioning of insulin A and B. Copyright Reserved Please Turn Over (1) (4) (15)

Downloaded from hlayiso.com MEMO Basic Education KwaZulu-Natal Department of Basic Education REPUBLIC OF SOUTH AFRICA GREENBURY SECONDARY SCHOOL ON MeL PLLA LIFE SCIENCES sccessvenseenydh hotel epanesiucmicses Grade 11 PAPER 3 -.PRACTICAL TEST - 2018 MARKS: 60 TIME: 60 minutes INSTRUCTIONS: 1. This paper consists of 6 pages. 2. Answer ALL questions in the spaces provided. 3. Write neatly. 4. Drawings must be done in pencil and labelled in ink. Question 1: HANDLING EQUIPMEMT, OBSERVING, DRAWING 1.1 PLANT STUDY Observe the FOUR plants (A, B, C and D).in front of you, and answer the questions below. 1.1.1 Write ONLY the LETTER representing the plant in the appropriate space. SY a) The plant that bears naked seeds dD b) The plant with a rhizome cv c) Agametophyte plant BY d) Aplant that bears fruit A 4 (4) 12 You are provided with the following equipment/apparatus: A flower specimen Forceps Microscope Dissecting needles Scalpel A slide Petri dish Cellotape You are required to: i) view the specimen under the microscope ii) dissect and remove the male and female reproductive structures 1.2.1 Handling of equipment: 1.2.2 Clarity of specimen (2) Copyright Reserved . Please Turn Over

Life Sciences 21 Downloaded fram hlayiSO.COM?d pacc:s-2018 NSC -Grade 11 1.2.3 Separate the male and female reproductive structures and paste them in the appropriate spaces below, using the cellotape provided. Male Reproductive Structure Female Reproductive Structure 4 “ (2) 1.2.4 Draw a neat labelled diagram of the male reproductive structure in the space below: anther % labels Filament, Y caption . Y neat, correct drawing male luctive. shuctue lower (4) 1.2.5 Name the pollinating agent for this flower. Wind x sp (1) 1.2.6 Give TWO reasons for your answer. feathery: stiqina Y nok showy, large. anthers, no sceut , no nectar —o (2) ee T (15) Question Two: SCIENTIFIC INVESTIGATION The diagram below represents an investigation, and is exactly like the apparatus set up in front of you. After a period of 24 hours red hydrogen carbonate indicator was added to each to each test tube. Hint: Hydrogen carbonate indicator is used'to show changes in carbon dioxide concentration as follows: e It turns from red to purple when the carbon dioxide level decreases. e It turns from red to yellow when the carbon dioxide levels increases. A B c , pond weed sn Zh Wh. Wh ' — é water Test tubes A, B and C In darkmess Please Turn Over Copyright Reserved

Downloaded fram hlayiso.com, ,.... 5 20 Life Sciences NSC - Grade 11 2.1.1 State the AIM for the investigation. Te determine whether a living organisms release CO2 during cellu@ar respiration — (2) 2.1.2 Tabulate the results that will be observed in test tubes A, B and C. Table sh owing dhe colour obseryed in each testtube, at 7 end of ex . Hest Tuas | A | B c | Test Title “ COLouR oF Red Yelbus Iles i. Conrect Weadingy Fact | Yells] Cowreck Results % ty each TT VY (5) 2.1.3 Explain the purpose of test tube A. It ach ao a_Contil te verify that the omanisms preset in B and C ave neapna ible. dor producing de Ds” avd (2) else 2.1.4 List WO wae in suhich the process taking place in test tube C is of biological importance. « COz released used 2d o raw wa'eal Ler phéte sy thesia — “Energy wkased during reopiraition is needed der all life “processes. 7 ~ (2) 2.2 You are given the following equipment and apparatus. 2 test tubes of the same size 2 water plants of the same species and the same size Water for the test tubes A beaker to use as a water bath, with some warm water A thermometer A lamp Some foil Hydrogen carbonate indicator Describe the METHOD (in steps) how you will use these to set up an investigation to demonstrate that light is a factor that affects the rate of photosynthesis. 1s Place a leq twig of the same species and. the same size Bd anact F toed Faved, sane amount dagen Carbonate eae TT. 2. Theat each "TT as "fellows 4 “TTA: bonoeped tn. in alanaatinea ei) \7 2 tee Both Ores ce dace by BPD Ter lod ” ae 5. Both TT's ave exposed to light fom the. lamp. Copyright Reserved Please Turn Over

itesienes Downloaded from hlayiso.Com pores 20 NSC — Grade 11 3. Question Three: SCIENTIFIC INVESTIGATION, DRAWING GRAPH 3.1 The MODEL set up in front of you is similar to the one in the diagram below. y-shaped glass tube glass bell jar plastic sheeting Bell-jar Apparatus 3.1.1 Name the process that this model demonstrate. Breath ing Mech éanion’) 3.1.2 What do each of the following parts in the model represent in the human: a) the Y-shaped tube/straw Trachea | bronchus b) the plastic sheeting diaphragm” muscle (2) 3.1.3 a) Your teacher will pull downwards on the plastic sheeting: State the result the balloons inf late b) Name this process. ithalat on ¥ (2) 3.1.4 Explain how the glass bell jar of the model is limited in demonstrating the actual human system. _ The qlass is Not flexi ble. So the effect a the exlernal intercostal “muscles 2) Canndt be ” demonsteted. 3.2 The TABLE below shows the percentage of carbon dioxide (CO2) emitted by different sectors in a certain city in South Africa. [| SECTOR | CO2 EMISSION (%) Transport 25 Residential 27 Industrial 15 Commercial 28 other 5 3.2.1 Draw a pie chart, on the next page, to represent the data in the table. Show ALL calculations. Copyright Reserved Please Turn Over

tie scene DOWnloaded fram hlayiso.com, 43-20: NSC ~ Grade 11 Carbon dioxide emissions in different sectors of acity ~ Transport = 25/100 x 360° = 90° Residential = 27/100 x 360° = 97,2” Industrial = 18/100 x 360°= 54° Residential a ee 2% qT Commercial = 28/100 x 360° = 100,8° Plot: Other = 5/100 x 360° = wy Industrial Semyereie 15% W1-3 come “al & all coved (5) 3.2.2 Describe how an increase in the COz concentration can lead to global warming. ~Tnereased CO2 will absorb more “neat ~ beading te enhanceol queen house. eflect ~ ~ Thertfre, preven bing ‘the exope of heat om the Earl's ang Sur ace, 4. Question Four: MAKE OBSERVATIONS/ ANALYSE/ INTERPRET DATA 41 ‘Observe the dissected specimen of an organ. Provide the label (A, B, C or D) for each of the following descriptions. a) Region where Malpighian bodies are situated A 4 _ b) Collects the urine from pyramids BY c) A wide portion leading to the ureters cv 4 d) A collection of collecting tubes, forming ducts of Bellini _> (4) 4.2 The TABLE below shows the following: ** The amount of each substance filtered daily from the blood into the Bowman’s capsule. ** The amount of each substance which is present in a day's urine output. Substrate | Filtrate Urine Water 180 litres | 1,5 litres Salts 500 g 15g Glucose 200 g Og urea 40g 42g 4.2.1 Give ONE reason for 200g glucose in the filtrate and none in the urine. all the alucose was re-absorbed into the. (1) blooal ab dhe proximal C. tube a Copyright Reserved Please Turn Over

ite sciences DOWnloaded fram hlayiso.COmM, pace-s-20:8 NSC — Grade 11 4.2.2 Calculate the percentage of filtered salt which are reabsorbed. Show 8, U5 % 19 calculations. __7@ Sall re-absorbed = ee oa ev ~) = 1% 4.2.3 Explain why the urea concentration is higher in the urine than in the ‘filtrate. Urea is added 4o the filhate from the blood in the Secoud capillary network “ during tubular excrehon” 2) 4.2.4 Give ONE reason why water is passively reabsorbed at the proximal convoluted tubule. fassive re-absorption occurs since the conceutratrou g, water is hiqher inthe olomerular Fillate than in the V blood ~ (mark FIRST one) 43 Some people with type | diabetes cannot produce insulin and therefore need to inject themselves regularly (insulin-dependent). An investigation was done to determine the action of two types of insulin (A and B). The glucose uptake rate of cells, when using each type of insulin, was measured over time. Glucose uptake under the influence of Insulin A and Insulin B in 24 hours Say a 2 WS —& ry = : v ; oF 3 |! . =-= InsulinA ceo t . a) a 2 4 ‘ Insulin B 4 4 Te a 0 LX a g () 5 10 15 20. BE oO Time (hours) a [Adapted from www.webmed.com] 4.3.1 Name the organ that produces insulin. Pancreas (1) 4.3.2 Using the information in the graph, state TWO differences in the functioning of insulin AandB. | caéelis 8 - Tr in nsulin . Glucose ustake peaks ata higher” level/ - Glucose uptake peaks ata lower level/ around TmMg/Ka[ min Y around (mg/kg [min cA « AML glucose uptake occurs im a short” +Gluceme uptake is gradual | - pert of hme] First S hours sustain luring a perc ay hours THE inkal &ptake tutcee rises othe inital wptake of gluene visto “rapidly b A apie within dhe slaty to he maximum over (4) First “Pew Wours “Shears 7 (15) (Any 2x2) (mark FiksT Two) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com Life Sciences Test: paper 3 - 2018 NSC - Grade 11 For the educator: THIS PAGE MAY HELP YOU TO SET UP: 1.1 Display PLANTs in a beaker/conical flasks in front of class, in the following order: A- Flower plant 7 B- Moss plant | label the C- Fern plant i beakers- A, B, C and D D- Pine plant 1.2 Give learners flowers of grass, and equipment (as per test) to help them dissect the reproductive parts. Look for a grass that you can see parts and that you can dissect. Try out first. 21 Set up the practical in front on class as per the diagram in question as demo. Label the test tubes A, B and C. 2.2 Arrange the equipment mentioned in front of class, as per the list in question. Learners can visualise. 3.1 Set up the bell jar. You will need to demonstrate the inhalation. 3.2 Mention to learners as pre-practical instructions, to bring ALL necessary stationary, including protractors, compasses, even tweezers, if your school don’t have, for the dissection, in question one. 4A You will need to dissect all the kidneys. Use tooth picks cut in half. Puta label on the broken end. Pierce the parts of the kidney using the pointed end, as follows: A- Cortex region B- Calyx C- Pelvis D- Pyramid Thank you. Kogie Govender (Greenbury) Copyright Reserved Please Turn Over

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