Life Sciences Grade 11 KwaZulu Natal June 2018 Paper & Memo

_____ Downloaded from hlayiso.com education Department: Education | PROVINCE OF KWAZULU-NATAL NATIONAL : SENIOR CERTIFICATE GRADE 11 | ABH, LIFE SCIENCES PROVINCIAL COMMON TEST JUNE 2018 MARKS: 150 TIME: 2% hours This question paper consists of 14 pages including this page. Copyright reserved

Life Sciences Downloaded from hlayiso.com June 2018 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 label them in blue or black ink. Draw diagrams, tables or flow charts 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

Downloaded from hlayiso.com Life Sciences June 2018 Common Test Grade 11 SECTIONA QUESTION 1 1.4 Various options are provided as possible answers to the following questions. Choose the correct answer and write only the letter (A to D) next to the question number (1.1.1 to 1.1.10) in your ANSWER BOOK, for example 1.1.11 D. 1.44 A vector is an organism that ... A _ is affected by pathogens. B carries a disease from one organism to another. C is autotrophic. D improves immunity. 1.1.2 Saprophytic bacteria ... obtain food from dead matter. use chemicals to make their own food always cause disease. have chlorophyll. UOWDY 13 Which ONE of the following groups of organisms does the malaria parasite belong to? A Algae B Fungi C Bacteria D_~Protista characteristic of all bacteria is that they ... A A lack a true nucleus. B move by means of flagellae. C are autotrophs. D have mitochondria for respiration. 1.1.5 The pistil of a flower consists of the ... anther, style and ovary. stigma, filament and ovary anther, filament and ovary. stigma, style and ovary. we meshe =) 1.1.6 Fertilisation in angiosperms occurs when ... the pollen tube grows down the style. pollen moves from the anther to the stigma. the ovary enlarges into a fruit. a sperm cell unites with the ovum. UNOUY Copyright reserved Please turn over

Life Sciences Downloaded from hlayiso.com June 2018 Common Test Grade 11 QUESTIONS 1.1.7 AND 1.1.8 ARE BASED ON THE INFORMATION AND APPARATUS BELOW. The diagram below represents a part of a potted plant showing three leaves. Each leaf is treated differently. This apparatus is used to investigate the factors essential for photosynthesis. sodium hydroxide black lining around entire tube qi. 1c7 After a few hours in the sun, which of the following will give a positive result with the iodine test? DOU>Y A only B only A and B only A, Band C 1.1.8 Which ONE of the following combinations of test tube/s and aim of investigation is correct? A B Copyright reserved Test tube A — to show that oxygen is given off during photosynthesis Test tube B — to show that carbon dioxide is given off during photosynthesis Test tube C — to show that light is necessary for photosynthesis Test tubes A, B and C — to show that chlorophyll is necessary for photosynthesis Please turn over

Life Sciences Downloaded from hlayiso.com 5 June 2018 Common Test Grade 11 1.1.9 Which ONE of the following characteristics is shared by bird and insect pollinated flowers? A Colourful with very feathery stigmas B Produce both nectar and a scent C Have pollen grains that stick together in clumps D Have anthers that are very large and dangle on the filaments 1.1.10 The condition of a muscle that has been subjected to extreme exhaustion has a... A large amount of ATP, large amount of glucose and large amount of lactic acid. B small amount of or no ATP, small amount of glucose and large amount of lactic acid. C large amount of ATP, no glucose and small amount of lactic D acid. small amount of ATP, no glucose and small amount of lactic acid. (10x 2) = (20) 1.2 Give the correct biological term for each of the following descriptions Write only the term next to the question number (1.2.1 to 1.2.10) in the ANSWER BOOK. 1.2.1 1.2.2 12:3 1.2.4 1.2.5 1.2.6 1.2.7 1.2.8 1.29 1.2.10 Copyright reserved A type of diet that excludes all animal products including eggs and dairy products A type of anaerobic respiration that occurs in yeast cells The general energy carrier in all living cells A protein made by white blood cells that destroys or neutralises an antigen A group of organisms composed of multinucleate, aseptate hyphae Site of the light-independent phase of photosynthesis in the chloroplast A leaf that has areas containing chlorophyll and areas without chlorophyll Places where seeds are stored to help preserve biodiversity Structure from which a fruit develops after fertilisation Plant structure that lacks true roots, stems and leaves (10 x 1) (10) Please turn over

Downloaded from hlayiso.com Life Sciences June 2018 Common Test Grade 11 13 Indicate whether each of the descriptions 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, both A and B or none next to the question number (1.3.1 to 1.3.5) in the ANSWER BOOK. COLUMN | COLUMN I 1.3.1 Contains vascular tissue A: Mosses B: Ferns 1.3.2 Present in the moss plant A: Underground stem B: __ Thick cuticle 1.3.3 Characteristic of wind pollination | A: Large, showy anthers B: Brightly coloured flowers 1.3.4 Produces seeds A: Gymnosperms B:__ Angiosperms 13:5 Function of flowers A: Attract pollinators B: _ Source of food (5x2) (10) Copyright reserved Please turn over

Downloaded from hlayiso.cot Grade 11 Life Sciences une 2018 Common Test 1.4 Study the diagrams below and answer the questions that follow. light 1.4.1 Identify: (a) Organelle A () (b) Organelle B dd) (c) Partl (1) (d) Gas 2 dd) (e) Gas3 (1) (f) Part 4 () (g) Compound 5 () (h) Gas 6 qd) 1.4.2 Explain ONE way in which organelle A is adapted for its functions. (2) (10) TOTAL SECTION A: 50 Copyright reserved Please turn over

Downloaded from hlayiso.com Life Sciences une 2018 Common Test Grade 11 SECTION B QUESTION 2 2.1 Two types of viruses are represented below. Virus 1 Virus 2 A 100nm A virus that infects bacteria An influenza virus 2.1.1 Name the parts labelled A and B. (2) Cs State why viruses are described as acellular. (1) 2.13 A vaccine was produced using proteins from Virus 2. Explain the effect of this vaccine in preventing influenza. (2) 2.1.4 Briefly explain how Virus 1 may be used as a biological control agent. (3) 2.1.5 What information, shown on the diagram, provides evidence that viruses can pass through microfilters? (2) (10) Copyright reserved Please turn over

Life Sciences 9 June 2018 Common Test Grade 11 2.2 Read the extract below and answer the questions that follow. 2.3 Copyright reserved Downloaded from hlayiso.com Listeriosis outbreak in South Africa in 2017-2018 Listeriosis is an illness caused by the bacterium Listeria monocytogenes. Listeria bacteria can grow at cold temperatures. The widespread outbreak of Listeria monocytogenes food poisoning in South Africa was a result of consuming contaminated processed meats. This foodborne illness produces fever, muscle aches and diarrhoea. Severe infections can cause headaches, meningitis, convulsions and death. Older adults and people with weak immune systems, pregnant women and babies have a high risk of developing life threatening infections. As at 12 March 2018, there had been 973 confirmed infections and 183 deaths from listeriosis in South Africa. 2.2.1 Name the bacterium that causes listeriosis. 2.2.2 List TWO symptoms of listeriosis mentioned in the extract. 2.2.3 Name TWO groups of people, indicated in the extract, which are more likely to develop listeriosis. 2.2.4 State why refrigeration does not prevent contamination of food by the listeriosis bacterium. 2.2.5 Antibiotics are currently being used as a treatment for listeriosis. Explain TWO conditions under which the antibiotic prescribed may not be successful in treating the disease. Evolutionary trends in animals show increasing complexity with regards to body structure. 2.3.1 Explain TWO advantages of a through gut to an animal 2.3.2 A coelom separates the gut wall from the body wall in certain animals. Explain the problem that this creates for such animals. 2.3.3 Explain how the problem stated in Question 2.3.2 is overcome in these animals. Please turn over (4) (10) (2) (8)

Life Sciences m June 2018 Common Test Downloaded from hlayiso.co Grade 11 2.4 The phylogenetic tree below shows different groups of animals. Annelida [Arthropoda Chordata 1 Porifera Cnidaria Platyhelminthes | | | Seomeniction | digestive cavity digestive cavity { with one opening with two openings | Hl | acoelomate coelgmate | a | digestive cavity a with one opening cephatisation diploblastic tplablastic radial bilateral symmetry opens intra cellular extra cellular digestion digestion | i tissue layers no tissue layers form true tissue i | J muti-cellular (metazoa) } unicellular (protista) 2.4.1 2.4.2 2.4.3 2.4.4 2.4.5 Copyright reserved Name the ancestral form of all groups of animals shown. List THREE evolutionary features, from the phylogenetic tree, that Cnidaria and Platyhelminthes have in common. Tabulate any TWO structural differences, from the phylogenetic tree, between Cnidaria and Platyhelminthes. State why annelids are more closely related to arthropods than to platyhelminths. Identify a feature of cnidarians, from the phylogenetic tree, that suits a sedentary mode of life. Please turn over (1) (1) (12) [40]

Downloaded from hlayiso.com Life Sciences June 2018 Common Test Grade 11 QUESTION 3 3.1 The diagrams below represent different plant groups. 8,11 Write the LETTER only of the plant group that has: (a) Seeds that are not enclosed in a fruit (1) (b) A dominant haploid generation (1) (c) Sporangia in a sorus (1) (d) Wind pollination only (1) 3.1.2 Explain the significance of the development of vascular tissue in plant evolution. (2) 3.1.3 Under conditions of severe drought, plant group C has a higher chance of survival than plant group B Explain TWO adaptive features of plant group C that will allow it a higher chance of survival during a drought. (4) (10) Copyright reserved Please turn over

Life Sciences Downloaded from hlayiso.com June 2018 Common Test Grade 11 3.2 When a water plant is placed near bright light it gives off bubbles of gas. An investigation was conducted to measure the rate of photosynthesis when a lamp is placed at different distances from the plant. The diagram and graph below show the apparatus used and results obtained for the investigation. 32-1 3.2.2 8:2.3 3.2.4 3.2.5 3.26 Copyright reserved bubbles of gas water with sodium lamp bicarbonate plant Identify the dependent variable and state how it was measured. Name ONE environmental factor that should be kept constant during the investigation. Apart from controlling the environmental factors state TWO other factors that should be kept constant. State TWO ways in which the reliability of the results can be increased. This investigation must be conducted as quickly as possible. Explain why the lamp should not be close to the plant for a long period of time. Describe the events of the light phase of photosynthesis. Please turn over (5) (14)

Downloaded from hlayiso.c Life Sciences 13 Grade 11 3.3 The structure below is found in the small inte absorption of food. 3.3.1 3.3.2 Copyright reserved om June 2018 Common Test stine and is responsible for Identify: (a) (b) (c) (d) Part A Tissue B PartC Vessel D Explain how this structure is suited for: (a) (b) Active absorption of food Protection of the lining of the small intestine Please turn over (1) (1) (2) (2) (8)

Downloaded from hlayiso.com Grade 11 Life Sciences 3.4 The table below shows the nutritional information of a cereal provided to learners at a local high school to supplement their daily nutrient intake. | Energy and nutrients | Unit | Per 50g | ee | serving | Energy _ kd 746 Protein | g 12 _ Total Carbohydrate gQ 29 _Total Fat g 6 Saturated fats _ g 1 Polyunsaturated fats g 3 Monounsaturated fats Q 2 _ Cholesterol Lom | Oo | 3.4.1 A 14-year-old girl needs 7 530 kJ of energy per day. Calculate the number of servings of cereal that would provide this amount of energy. Show all working. 3.4.2 Draw a bar graph to represent all data in the table relating to the fat content of the cereal. TOTAL SECTION B: SECTION C QUESTION 4 In recent years, there has been an increase in the number of people affected by diabetes. Hormonal control of blood glucose levels is affected in diabetics. Give a brief description of diabetes and discuss the homeostatic control of high blood glucose levels in a healthy person. Also describe what happens to glucose during the process of glycolysis in cellular respiration. Content: Synthesis: NOTE: NO marks will be awarded for answers in the form of flow charts, tables or diagrams. TOTAL SECTION C: GRAND TOTAL: Copyright reserved ne 2018 Common Test (6) (8) [40] 80 (17) (20) 20 150

PARAS ARAAA AAS IR 3 Ay KwaZulu-Natal Department of Education REPUBLIC OF SOUTH AFRICA LIFE SCIENCES PROVINCIAL COMMON TEST MEMORANDUM -— JUNE 2018 MARKS: 150 Copyright reserved _ GRADE 114 This memorandum consists of 9 pages. Please turn over

Downloaded from hlayiso.com Life Sciences — Grade 11 2 June Common Test 2018 NSC — Memorandum PRINCIPLES RELATED TO MARKING LIFE SCIENCES A. 10. 11. 12. 13. 14. 15. 16. 17. If more information than marks allocated is given Stop marking when maximum marks is reached and put a wavy line and 'max' in the right- hand margin. If, for example, three reasons are required and five are given Mark the first three irrespective of whether all or some are correct/incorrect. If whole process is given when only a part of it is required Read all and credit the relevant part. If comparisons are asked for, but descriptions are given Accept if the differences/similarities are clear. If tabulation is required, but paragraphs are given Candidates will lose marks for not tabulating. If diagrams are given with annotations when descriptions are required Candidates will lose marks. If flow charts are given instead of descriptions Candidates will lose marks. If sequence is muddled and links do not make sense Where sequence and links are correct, credit. Where sequence and links are incorrect, do not credit. If sequence and links become correct again, resume credit. Non-recognised abbreviations Accept if first defined in answer. If not defined, do not credit the unrecognised abbreviation, but credit the rest of the answer if correct. Wrong numbering If answer fits into the correct sequence of questions, but the wrong number is given, it is acceptable. If language used changes the intended meaning Do not accept. Spelling errors If recognisable, accept the answer, provided it does not mean something else in Life Sciences or if it is out of context. If common names are given in terminology Accept, provided it was accepted at the national memo discussion meeting. If only the letter is asked for, but only the name is given (and vice versa) Do not credit. If units are not given in measurements Candidates will lose marks. Memorandum will allocate marks for units separately. Be sensitive to the sense of an answer, which may be stated in a different way. Caption All illustrations (diagrams, graphs, tables, etc.) must have a caption. Copyright reserved

Downloaded from hlayiso.com Life Sciences — Grade 11 3 June Common Test 2018 NSC — Memorandum SECTION A QUESTION 1 1.4 Byv Avy Dvv AVY Die Dv¥v AVY Cvv Cvv ByYY (10x 2) (20) ke ay ey Sk ew ey a ws 8 pan ae ar ee >oOMNDURWDH HL oO 1.2 Vegan’ Alcoholic fermentation” ATP /Adenosine triphosphate Antibodyv/Immunoglobulin Fungiv Stroma” VariegatedY Seed banks” Ovary” Thallus¥y (10) SOONOnRWD = OS Sh ekg Bs etiyal wey 4S ds oO 1.3 B onlyYv Nonev ¥ A onlyY ( Both A and BvY ( ( ( ay aoe oe ek anon o Both A and BYv (5x 2) 1.4 s an ) Chloroplast’ ( ) MitochondrionY ( ) Granumy¥ ( ) Oxygen” ( ) Carbon dioxidev ( ) CristaY ( g) GlucoseY h) Carbon dioxidev YS v4 hw ‘ = Mi 1.4.2 - ee ects chlorophyll” = Onlersbly a ret pe ULegy to absorb radiant energyY - Double membrane is permeableY to CO. and waterv/the requirements for photosynthesis - Thylakoids occur in stacks in the granum”¥ to increase surface area for absorption of radiant eneray’ - Enzymes are presentY P eae the reactions of photosynthesisy/ rae | Any 4 b> aes ys De caer (Mark first ONE only) Paeesemves ~ pret eng AL SECTIONA: 50 she or | “2 Please turn over Copyright reserved

Downloaded from hlayiso.com Life Sciences — Grade 11 4 June Common Test 2018 NSC — Memorandum SECTION B QUESTION 2 2.1 2121 A-— Protein coat”/capsid B — Nucleic acidY (2) 2.1.2 No organelles“ /cytoplasm / Ao nucki ns, rc bose ks cle Chaya 2.1.3 - It stimulates the production of antibodies” - to prepare the body against exposure to the flu viruses iaae vwmihs(2) 2.1.4 - Some bacteria cause diseasev - Viruses that infect bacteria will destroy” pathogenic bacteria - Diseases caused by bacteria may thus be preventedY (3) 2.1.5 100nmv ¥ (2) (10) 2.2 2.2.1 Listeria monocytogenesv (1) 2.2.2 - Fever” - Muscle aches¥ - DiarrhoeaY - HeadachesY - Msningitisy - Convulsions” (Mark first TWO only) Any 2 (2) 2.2.3 - Older adultsY - People with weak immune systems¥ - Pregnant women” - BabiesY (Mark first TWO only) Any 2 (2) 2.2.4 Listeria grows at cold/low temperaturesY fick. Tos fw ; (1) 2.2.5 - The bacteria may mulalef/ new Siren of bacterin cleveléjed making them resistant to the antibiotic” - The patient may not complete the course of antibioticsv/~ courted anbhehe causing the Listeria bacteria to flourish againv (4) (Mark first TWO only) (10) Copyright reserved Please turn over

Downloaded from hlayiso.com Life Sciences — Grade 11 5 June Common Test 2018 NSC - Memorandum 2.3 2.3.1 - Since food moves in one direction through the xr - it prevents, mixing of digested food and undigested raterialv ingestion and egestion can occur simultaneously - Allows specialisation of different parts of the digestive system Is: peeoke making digestion more efficient |, cluyto on tue oceur FP tay: POUL Fon aera, (Mark first TWO only) beeen 2.3.2 - The travel distance for gases, waste & nutrients is nsreases Yas - and hence diffusion is insufficient for this purpose” vs (2) wes Apts koe 23:3 - The presence of a blood system” - allows for the transport of gases, waste & nutrients over a greater distance” (2) (8) 24 2.4.1 ProtistaY (1) 2.4.2 - MulticellularY” - Extracellular digestion’ - Tissue layers form true tissues” - Digestive cavity with one openingY Any 3 (3) {Mark first THREE only) 243 a vw [Chic Cnidaria Platyhelminthes | Radial symmetry” Bilateral symmetry” Diploblastic” TriploblasticY | No cephalisation’” Cephalisation’ (Mark first TWO only) Any 2x2 + 1 for table (5) 2.4.4 Annelids have more characteristics in common with arthropods than platyhelminths vv OR Annelids and arthropods share a more recent common ancestor’ ¥ —_—_—— (2) 2.4.5 Radial symmetry” (1) y! ry (12) [40] Copyright reserved Please turn over

Downloaded from hlayiso.com Life Sciences — Grade 11 6 June Common Test 2018 NSC — Memorandum QUESTION 3 3.1 3.1.1 (a) DY (c) AY (d) DY 3.1.2 - Specialised tissue to transport food and water” - enabled plants to grow taller” 3.1.3. - Does not need water for-fertilisationv’ - so reproduction can still occur” - Seeds have a testa” - for protectionv’7/ to prevent dehydration - Presence of cuticle” - to reduce-water lossv” - Deep rooting system” - to access undérgrotind water” - Seeds can remain dormant™ - to germinate when conditions are favourableY Any (2 x 2) erminate Wis! eine Ase 3.2 3.2.1. - Rate of photosynthesis” - Measuring the rate at which gas bubbles are released” on? 3.2.2 On “Temperaturey - Carbon dioxide concentration’ - pHy (Mark first ONE only) Any 1 3.2.3 - Same individual ‘to take all readings/measurements - Same measuring instruments”/ stopwatch/ ruler must be used for all readings - Same plant for entire investigation’ - Same lamp for entire investigation’ (Mark first TWO only) Any 2 3.2.4 - Repeat the investigation’ - Take many readings at each distancev /use average for each distance (Mark first TWO only) Copyright reserved Please turn over (4) (10)

Downloaded from hlayiso.com Life Sciences — Grade 11 fe June Common Test 2018 NSC — Memorandum 3.2.5 - Lamp may cause increase in temperature/heating of apparatusv - which would affect the rate of photosynthesis aut Be wad) be (2) felipe urd 3.2.6 - Occurs in the grana of the chloroplastv” - Chloro ophylVabsorbs radiant énergy” - Some energy is used to combine ADP + PY - to form ATPY . - Some energy is used to split water’ /phrtoby 2 - into hydrogen and oxygenY - Oxygen is releasedv into the atmosphere bs Lee . - Energised hydrogen is taken up by a carrier, Ge cate uel blhoog, Any 5 (5) (14) 3.3 3.341 (a) Lactealv (1) (b) Columnar epitheliumv (1) (c) Blood capillary” (1) (d) Venulew (1) 3.3.2 (a) , - Columnar epithelial cells have many mitochondria¥* - that provide energy” for active absorption (2) - Brunners glands/goblet cells secrete an(alkaliné)mucus” - which protects the lining of the small intestine from acid chymev / Hieber 23g (2) = Gout OWs Sarak mucud a | vu Liar Ye prehek ements Leno ager ie Copyright reserved Please turn over

Downloaded from hlayiso.com Life Sciences — Grade 11 8 June Common Test 2018 NSC — Memorandum 3.4 3.4.1. 7530kJd + 746kd “= 10% (2) 3.4.2 Fat content per 50g serving of a cereal G | 74 6 3 5 & we 4 rc} 53 3 — a2 0 Total Saturated Polyunsaturated Monounsaturated fat fats fats fats Type of fet “Lb Criterion ZZ Mark Type of graph 4 Title 1 Labels on x axis and y axis with units 1 Scale of x axis (equal width and 1 spacing of bars) and y axis Drawing of bars 2 marks: All correct 1 mark: - 1 to 3 correct TOTAL SECTION B: 80 Copyright reserved Please turn over

Downloaded from hlayiso.com 9 June Common Test 2018 NSC — Memorandum Life Sciences — Grade 11 SECTION C QUESTION 4 Diabetes . - The pancréas of diabetics produces insufficient amounts of insulin’ (type 2) - orno insulin” (type 1) “ - orthe body cells are not receptive to insulin” - Diabetes is characterised by high blood glucose levels¥ - and the elimination of glucose in the urine 5 - Diabetics experience frequent urinationv /thirst/hunger - Diabetics get tired easily“/lose weight easily Any 5 (5) Homeestatic control of high blood glucose levels - When the blood glucose level is highY/above normal - The cells in the islets of Langernans”/pancreas - secrete insulin” into the blood - stimulating the absorption of glucose into the body cells” - Excess glucose is converted into glycogenv - and stored in the liver“/muscles _ - The blood giucose level decreases 5 - and returns to normal~” Any 7 (7) Glycolysis - Occurs in the cytosolv - Glucose is broken dewnY - to form pyruvic acid’ - Energy-rich hydrogen atoms are released” - - Hydrogen combines with a camer” 7éo-enzyme - Some energy released is used to combine ADP + PY - to produce ATPY - Process is controlled by enzymes” Any 9 (8) Content: (17) Synthesis: (3) (20) ASSESSING THE PRESENTATION OF THE ESSAY Relevance Logical sequence Comprehensive All information provided is relevant | Ideas arranged in a logical/ cause- Answered all aspects required to the topic effect sequence by the essay in sufficient detail All information is relevant to: Ideas are presented in a logical All aspects are answered - Diabetes sequence with regards to: comprehensively as follows: - Homeostatic control of glucose | - Diabetes - Diabetes (3/5) - Glycolysis - Homeostatic control of glucose |- Homeostatic control of There is no irrelevant information - Glycolysis glucose (5/7) - _Glycolysis (3/5) 1 mark 4 mark 1 mark TOTAL SECTION C: 20 GRAND TOTAL: 150 Copyright reserved

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