Life Sciences Grade 11 Paper 3 NSC Prelim 2017 Paper & Memo

KZN DEPARTMENT OF EDUCATION GREENBURY SECONDARY SCHOOL FINAL EXAMINATION — 2017 -- GRADE 11 LIFE SCIENCES PAPER 3 -- PRACTICALS EXAMINER: S.SINGH DURATION: 1 HR MODERATORS: K. GOVENDER; C. JUGDHAW MARKS: 60 DATE: 28:09:2017 NAME: GRADE: 11 INSTRUCTIONS TO LEARNERS: 1. This paper consists of 6 pages 2. Answer all questions in the spaces provided on the question paper. 3. Write neatly. 4. Drawings must be done in pencil and labelled in ink. QUESTION: 1 -- HANDLING EQUIPMENT, OBSERVING, DRAWING 1.1. PLANT STUDY Observe the FOUR plant types (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) 1.2. You are provided with the following: A specimen Forceps Microscope Dissecting needle Scalpel Aslide Petri dish Tape You are required to: i) view the specimen under the microscope ii) dissect and remove the male and female reproductive structures 1.2.4. Handling equipment: 1.2.2. Clarity of specimen: (2) PTO/ 1.2.3. Identify...

1.2.3. Identify the plant organ. (1) 1.2.4. Separate the male and female reproductive structures and paste them in the appropriate space below: Male Reproductive Structure Female Reproductive Structure (2) 1.2.5. Draw and label a neat diagram of the Male Reproductive Structure in the space below. (4) 1.2.6. Name the pollinating agent of this flower. (1) 1.2.7. Give ONE reason for your answer. (1) [15] PTO/ Question 2

(3 QUESTION 2: DESIGN / PLAN INVESTIGATIONS OR EXPERIMENTS 2.1. The apparatus for an investigation is set up in front of you. Study it and answer the questions below. 2.1.1. Write down the AIM of the investigation. (1) 2.1,2. Write down the steps you would follow to carry out this investigation, using the apparatus in front of you. (4) 2.1.3, State ONE precaution that must be observed when carrying out this investigation. (1) 2.1.4, Draw and label the leaf showing the results of the experiment. (4) 2.2. Smoking is one of the main causes of cancer in the lungs. As a voluntary worker at a Hospice you have been given a project to carry out. You have been asked to investigate the number of lung cancer patients that were once smokers. Write down FIVE steps that you would follow when planning out your investigation. (5) PTO/ Question 3

QUESTION 3: MAKE OBSERVATIONS/ ANALYSE/ RECOGNISE 3.1, Observe the specimen of the organ provided and answer the questions that follow. 3.1.1. Provide labels for the parts labelled: (4) 3.1.2. Name the functional unit of this structure: (1) "3.1.3. State TWO functions of this organ: (2) (7) 3.2. Two Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch to glucose. They are provided with two different enzymes (Enzymes A and B), starch, warm water at about 37°C and basic apparatus and chemicals to test for glucose. 3.2.1. Formulate a HYPOTHESIS for your investigation. (2) 3.2.2. Name the following: Independent variable: C , Dependent variable: Controlled variable: 3.2.3. Explain why the water bath was kept at 37°C. (1) (6) [13] PTO / QUESTION 4

QUESTION 4 RECORDING DATA, DRAWING A GRAPH/ INTERPRETING DATA, MEASURING, CALCULATING 4.1. Study the set-up of the apparatus shown in the diagram below. The number of oxygen bubbles (O2) released was counted at different times of the day as shown by the watch. Since photosynthesis releases oxygen, the amount of oxygen released was used as an indication of the rate of photosynthesis. Morning Evening O2 bubbles Pond- weed Water 4.1.1. Draw a table to record the results of this investigation. 4.1.2. Use the information from the table you drew above, to draw a bar graph. (5) PTO/ 4.1.3, What...

4.1.3. What general conclusion can be made from the results of the investigation on page 5. (1) 4.2. POPULATION ECOLOGY 4.2.1. A group of Grade 11 learners have been selected to assist a Flour Mill Company to determine the number of flour beetles in Bread Flour, As practice a simulation has been set up for you. Each jar contains 250g flour. The spoon measures 10g. Carry out the investigation three times and calculate number of flour beetles present in the jar. Write down the formula and show ALL working. (6) 4.2.2, State ONE way how you can increase the reliability of your results. (1) [17] GREENBURY SECONDARY SCHOOL DEPARTMENT OF MATHS & SCAENCES

(3 KZN DEPARTMENT OF EDUCATION GREENBURY SECONDARY SCHOOL FINAL EXAMINATION — 2017 -- GRADE 11 LIFE SCIENCES PAPER 3 -- PRACTICALS EXAMINER: S.SINGH DURATION: 1 HR MODERATORS: K.GOVENDER;C.JUGDHAW MARKS: 60 DATE: 28:09:2017 GREENBUIY SECONDARY SCHOOL 1 OF MATHS & SCIENCES HOLD. MPO PALLAY 2 Te) GRADE: 41___ DEF NAME: __ M@mo INSTRUCTIONS TO LEARNERS: v 1. This paper consists of 6 pages 2. Answer all questions in the spaces provided on the question paper, 3. Write neatly, 4, Drawings must be done in pencil and labelled in ink. QUESTION: 1 -- HANDLING EQUIPMENT, OBSERVING, DRAWING 1.1. PLANT STUDY Observe the FOUR plant types (A, B, C, and D) in front of you, and answer the questions below. 1.1.4. Write ONLY the LETTER representing the plant in the appropriate space. a) The plant that bears naked seeds 8 Pine ~ b) The plant with a rhizome. C_ Fern v c) A gametophyte plant. A Mossv d) A plant that bears fruit D Ficus ~ (4) 1.2. You are provided with the following: A specimen Forceps Microscope Dissecting needle Scalpel Aslide Petri dish Tape 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 equipment: 1.2.2. Clarity of specimen: (2) PTO/ 1.2.3. Identify...

v — (1) 1.2.3. Identify the plant organ. Flower 1.2.4. Separate the male and female reproductive structures and paste them in the appropriate space below: Male Reproductive Structure Female Reproductive Structure Sick anther Slick ovary © (2) 1.2.5, Draw and label a neat diagram of the Male Reproductive Structure in the space below. (4) anther drawing, ZY Silament a Male Re! roduckive structure of Flower” / Stamen ( 1.2.6. Name the pollinating agent of this flower. (1) Wind “ 1.2.7. Give ONE reason for your answer. wv (1) Larne anthers present ~ / 7 Smell petals present [15] PTO/ Question 2

QUESTION 2: DESIGN / PLAN INVESTIGATIONS OR EXPERIMENTS 2.1. The apparatus for an investigation is set up in front of you. Study it and answer the questions below. 2.1.1. Write down the AIM of the investigation. (1) 4 Vo test for starch wn aceen\eaves. / To test \f chlorebhull is” essential Lor phetasunthesis 2.1.2. Write down the steps you would follow to carry out this investigatiorr, using the apparatus in front of you. (4) L. Beil the leaf in water.” 2.Boi\ the leaf in alechol.” Place eal wna test-tube of alechel ard place thetest=-bube iw boilina water BL. Rinse \eal m hot water ~ ~ 4 Add \odine to decclourised leal” 2.1.3. State ONE precaution that must be observed when carrying out this investigation. (1) Ensure that the burner is off“ when beiling the leat wh alcehol ~ 2.1.4, Draw and label the leaf showing the results of the experiment. {4) Y broun near, Correct blue -black Vv a ara a) Diagram showna reeult Sterch Lest ~~ 2.2. Smoking is one of the main causes of cancer in the lungs. As a voluntary worker at a Hospice you have been given a project to carry out. You have been asked to investigate the number of lung cancer patients that were once smokers. Write down FIVE steps that you would follow when planning out your investigation. (5) \.Pecide on sample size /Tdenify size of the aroub te be tested, 2. Prebare ao questionaire ~ B-Decide how cmd when questionarces will be Aiabributed and collected. &, Tenti@u the aroubs of pechle te be investinated eo. clinics, hespitels senior citlaen aroubs houses. S. How will data be recoraed PTO/ Question 3 3

QUESTION 3: MAKE OBSERVATIONS/ ANALYSE/ RECOGNISE 3.1. Observe the specimen of the organ provided and answer the questions that follow. 3.1.1, Provide labels for the parts labelled: At Cortex c: Calux B: Peis D: Medulle (4) 3.1.2, Name the functional unit of this structure: (1) Nephron 3.1.3. State TWO functions of this organ: (2) Osmereaulation Reauwlalton of bY | Salt requlation Removal of metobolc wastes | excretion. © (7) 3.2. Two Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch to glucose. They are provided with two different enzymes (Enzymes A and B), starch, warm water at about 37°C and basic apparatus and chemicals to test for glucose. 3.2.1. Formulate a HYPOTHESIS for your investigation. (2) Wy Eneaume A will dinest Starch te alucese / J ~~) . Eameume @ wr\\ digest, starch mio “alucese wo t 3.2.2, Name the following: Independent variable: _Ene@unne v 7 \ Dependent variable: Conversion of starch inte alucese /EBESHOM ae pees xe Controlled variable: Same T° /Same amt of slarth [same awk of BnBuind / identical beaker or test tube (3) 3.2.3. Explain why the water bath was kept at 37°C. (1) oe Obtimum ve Soc EnZuwne ackivity [ Body \ T J (6) [13] PTO / QUESTION 4

on QUESTION 4 RECORDING DATA, DRAWING A GRAPH/ INTERPRETING DATA, MEASURING, CALCULATING 4.1. Study the set-up of the apparatus shown in the diagram below. The number of oxygen bubbles (02) released was counted at different times of the day as shown by the watch. Since photosynthesis releases oxygen, the amount of oxygen released was used as an indication of the rate of photosynthesis. Morning Oo Evening 0, bubbles Pond- weed Water 4.1.1. Draw a table to record the results of this investigation. (4) Ti AN G mes ©6100 [OM,c@ [12.00 |IG.o6 [18.06 |21.06 Maorrect No. of Bub) e 20 20 \o fa) WANG i Wes 2 Correct 4.1,2. Use the information from the table you drew above, to draw a bar graph. (5) Number of Bubbles released during 24 hours V 2S 20) No of 's Bullies to Type “ Saale on ¥ EY v Label for ¥ BY” Width & spacing v OGM C6 oA Co Time of Day Clres) Ir 02 \Gtoe Ug .00 PTOL 4.1.3. What... 5

4.1.3. What general conclusion can be made from the results of the investigation on page 5. (1) Photosunthesis (s hiahest from 12> 3pm” vA ; The caté o& photosynthesis increases Prom 6.00 to 12.00 , Temorns stable at is.co aud decieases thereatter Until ib stoke 4.2. POPULATION ECOLOGY 4.2.1. A group of Grade 11 learners have been selected to assist a Flour Mill Company to determine the number of flour beetles in Bread Flour. As practice a simulation has been set up for you, Each jar contains 250g flour. The spoon measures 10g. Carry out the investigation three times and calculate number of flour beetles ( ) present in the jar. Write down the formula and show ALL working. (6) N= Tetol Mags of Flour + Beans ~ Ne. c& Beans to Somble ot BS2e = on Swork Vaan Ang Bene C |= Sample SVE lh Sampo SwZ + = Onawer Ay Answer B + Qnawer CM Sombl gies B+ 3 a ¢ ea STATA BSH = sv a \o 4 = ig BBB = Bgl = 132,32 Clour brelles 4.2.2. State ONE way how you can increase the reliability of your results. (1) Take. more Sawbles ond Land the average. v/ Choose, Samples randomly. [17]