Life Sciences Grade 11 KZN November 2022 Paper & Memo

Downloaded from hlayiso.com ——________— | STANMORE SECONDARY SCHOOL | EXAMINER: MRS J RAMSEWAK MODERATOR: MR S HARICHURN. MARKS: 120 DURATION: 2 HOUR oe eerie erg ee it LIFE SCIENCES 1 18 " ia a i CONTROLLED TEST t i ‘ i " e a os % GRADE 11 | N.B. This question paper consists of 3 QUESTIONS and 10 PAGES. INSTRUCTIONS AND INFORMATION Read the following instructions carefully before:answering the questions. d: Answer ALL the questions. nt NOVEMBER 2022 " 2. Write ALL the answers in the ANSWER BOOK. in this question paper. 4. Present your answers according'to'the instructions of each question. 5. ALL drawings must be done in pencil and labelled in blue or black ink. 3. Number the answers correctly according to the numbering system used 6. Write neatly and legibly. | ] | | Please Turn Over

Downloaded from hlayiso.com Life Sciences November Controlled Test 2022 QUESTION 1 1.1. Various options are provided 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. Energy is released during ... A. photosynthesis B. cellular respiration C. transpiration D. digestion 1.1.2. | The carbon dioxide is transported in the blood mainly in the form of . A. urea B. carboxylic acid C. bicarbonate ions D. lactic acid Which ONE of the following blood vessels carries oxygen from the 1.1.3, _ lungs to the heart? A. Pulmonary artery B. Renal artery C. Hepatic vein D. Pulmonary vein An investigation was performed to calculate the number of locusts in 1.1.4. a maize field: Fifty locusts were caught in little cages, marked with little dots and then released again. Two weeks later 96 locusts were caught and 8 of them had dots on them. The estimated number of locusts in the maize field was: P= MxC R A. 600 B. 16 Cc. 4 D. 154 1.1.5. The form in which excess glucose is stored as in the body. A. starch B. fats C. proteins D. glucagon (5 x 2) (10) Please Turn Over

Life Sciences D own load ed frp m h lay i SOnG QAM ontrotied Test 2022 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. — 1.2.5.) 1.2.1. The hormone released by the pancreas that decreases the blood glucose concentration. 1.2.2. The structure in the human respiratory system that closes the larynx when food is swallowed. 1.2.3. The chewing process that breaks food molecules up mechanically. 1.2.4. The type of competition between members of different species. 1.2.5. Measurement of the total amount of carbon dioxide emissions of an individual per year. (5x1) (5) 1.3. Indicate whether each of the descriptions in Column | apples 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 1.3.3.) in the ANSWER BOOK. Column | Column Il 1.3.1. Site of cellular respiration A. Chloroplast B. Mitochondrion 1.3.2. Transport of digested nutrients from A. Renal vein the small intestine to the liver. B. Hepatic vein 1.3.3. Hormone involved in the A. ADH reabsorption of water. B. Glucagon. (3x2) (6) 1.4. Study the diagrams below. DIAGRAM 1 _ DIAGRAM 2 DIAGRAM 3 Please Turn Over

Downloaded from hlayiso.com Life Sciences November Controlled Test 2022 1.4.1. Name the kingdom to which the above organisms belong. (1) 1.4.2. Name the Division/Phylum to which the organism in DIAGRAM 1 (1) belongs. 1.4.3. Give the letters that represent the gametophyte. (2) 1.4.4, Give the DIAGRAM NUMBER of the group that DOES NOT rely on (2) water for reproduction. 1.4.5. Give the DIAGRAM NUMBER of the group that produces seeds. (2) (8) 1.5. The diagram below represents the human urinary system. 1.5.1. Label parts: a) G (1) b) E (1) c) F (1) sre Name that main blood vessel that: a) Transports deoxygenated blood back to the heart. (1) b) Is under highest blood pressure. (1) 1.5.3. Give the LETTER and NAME of the : a) Part that collects and stores urine temporarily. (2) b) Blood vessel that transports oxygenated blood directly into (2) the kidney. c) Tube that transports urine from the kidney to part E. (2) (ti SECTION A: 40 MARKS Please Turn Over

Down loaded from h IAYISOG AM ontroted Test 2022 Life Sciences SECTION B QUESTION 2 2.1 The diagram below represents the structure of a nephron. Filtrate 2.1.1. Identify the parts labelled: a) A (1) b) B (1) c) C . 2.1.2. Name the process that takes place at C. ) 21.3. The concentration of various substances in the blood, filtrate and urine are given below. SUBSTANCES Location Urea Glucose | Proteins | Salts g/100cm® | g/100cm? | g/100cm? | g/100cm* Blood at partA | 0.03 0.10 8.00 0.72 Filtrate 003 0.10 0.00 0.72 Urine 2.00 0.00 0.00 1.50 Please Turn Over

Downloaded from hlayiso.com Life Sciences November Controlled Test 2022 Which of the substances shown in the table .... (1) a) Did not move from the part labelled A to B? 1 b) Is present in the filtrate, but is completely reabsorbed at the ) part D? 1 c) Reaches the highest concentration in the urine? ao (4) 2.1.4. Explain TWO structural adaptations of the part labelled D. a 2.1.5. List ONE way in which the information in the table would differ if it were applicable to a patient suffering from diabetes mellitus before any treatment was given. (13) yas Study the diagram below and answer the questions. Please Turn Over

tiresciencees Downloaded from hlayiso GOQMoonroies test2022 221 Identify parts: a) D (1) b) E (1) c) F (1) 2.2.2. _ Name the epithelial tissue that lines the inside of part C. (1) 1 2.2.3. State the function of the part labelled B. (1) a. Describe the process of inhalation. (5) 2.2.5. The corona virus, responsible for Covid-19, infects the lower respiratory passages. This causes the accumulation of fluids in the pulmonary tubes and in the parts labelled A. Furthermore, the tissues that line part A become scarred and thickened. This may lead to the dead of a patient. a) Name the part labelled A. (1) b) Explain why the infection of lower respiratory pathways leads to possible death. (4) (15) 2.3. The diagram below represents a certain section of the human alimentary canal (digestive canal). 2.3.1. _ Identify parts: a) A (1) b) c (1) c) F (1) 2.3.2. State THREE functions of the part labelled B. (3) 2.3.3. Explain how fat digested would be affected if the duct labelled D (2) were blocked. Please Turn Over

Life Sciences Down loaded from h layisQ, COM vores Test 2022 234 Explain TWO ways in which the part labelled E is structurally suited (4) “for the efficient absorption of digested nutrients. (12) QUESTION 2: 40 MARKS QUESTION 3 3.1. Read the extract below. The weevil, Neochetina eichhorniae.has been very effective in controlling the Water Hyacinth. The weevil feeds on the soft parts of the plant, preventing the plant from reproducing and causing it to break up. The Water Hyacinth is an invasive alien plant that has taken over South African rivers, dams and lakes. If left uncontrolled, Water Hyacinth grows and forms a thick layer that covers the surface of the water. Researchers wanted to determine the optimum number of weevils to release per plant. + Thev arew Water Hyacinth in six large water tanks. + They placed a different number of weevils in each tank. + They then recorded the number of days it took the weevils to control the Water Hyacinth. The results are recorded in the table below. Number of weevils per plants Days taken to control placed in tank water hyacinth 4 50 8 40 12 30 16 20 20 20 Control (no weevils) No change in Water Hyacinth Please Turn Over

Life Sciences D own load ed fre m h lay i So QD controtied Test 2022 3.1.1. Name the method used when a natural pest is released to control an alien invasive species. (1) 3.1.2. List TWO other ways, besides the method mentioned in QUESTION 3.1.1. to control alien invasive plants. (2) 3.1.3. What would the optimum number of weevils be to introduce per plant? (1) 3.1.4. Explain ONE reason for your answer in QUESTION 3.1.3. (2) 3.1.5. | Give ONE way how you would improve the reliability of this investigation. : (1) 3.1.6. For the above investigation, give the: (1) a) Dependent variable 1 b) Independent variable “) 3.1.7. Give TWO factors that need to be controlled to ensure that the (2) investigation is valid. 3.1.8. Explain the negative impact that Water Hyacinth will have for: a) A farmer (2) b) A sportsman who enjoys swimming and canoeing. a 3.2 The diagrams below show animals that belong to the same phylum. 32.1 Name the phylum to which the above organisms belong. (1) 3.2.2. | Whattype of symmetry is shown by members of the phylum above? (1) Draw a simple labelled diagram of a cross section through the body 3.2.3 wall of tissue layers found in this phylum. (4) Explain how the body plan/symmetry of this phylum of animals is 3.2.4. : : - (2) suited to their sedentary mode of living. (8) Please Turn Over

Life Sciences 3.3. Soa. 3.3.2. 3.3.3. 3.4 3.4.1. 3.4.2. 3.4.3. Downloaded from hlayiso.com jovember Controlled Test 2022 The table below shows the global carbon dioxide emissions from fossil fuels combustion and the burning of fossil fuels and some industrial processes in 2014. COUNTRY CARBON DIOXIDE EMISSION (%) China 30 European Union 9 USA 15 Indian and Russian Federation 12 Japan 4 Other 30 Which single country emitted the most carbon dioxide to the environment? Explain the impact of the increased carbon dioxide emissions on the environment. Each country has been given a mandate to reduce its carbon dioxide emissions to reach a certain target. This is reviewed annually by the Conference of Parties (COP), a United Nations organization comprising of 195 countries that meets to assess progress in dealing with climate change. Explain TWO reasons why some countries are against reducing the carbon dioxide emissions by their industries. The diagram below is that of a bacterial cell. Identify parts labelled 5 and 7. State the function of the part labelled 1 and 7. Microorganisms can be used in the production of medicines such as insulin and antibiotics. Describe how the bacterium E. coli is used in the production of insulin for the treatment of diabetes. QUESTION 3: 40 MARKS (1) (3) (4) (8) (2) (2) (5) (9) TOTAL: 120 MARKS

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