Life Sciences Grade 11 KZN March Test 2024 Paper & Memo

Downloaded from Stanmorephysics.com KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 11 MARKS: 50 TIME: 1 hour This question paper consists of 9 pages. Copyright Reserved Please Turn Over

Life Sciences March 2024 Common Test Swnloaded from Stanmakephysigs.com INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. Answer ALL the questions. 2. Write ALL the answers in the 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. Present your answers according to the instructions of each question. 6. Do ALL drawings in pencil and label them in blue or black ink. 7. Draw diagrams, tables or flow charts only when asked to do so. 8. The diagrams in this question paper are NOT necessarily drawn to scale. 9. Do NOT use graph paper. 10. You may use a non-programmable calculator, protractor and a compass. 11. Write neatly and legibly. Copyright Reserved Please Turn Over

Life Sciences Swnloaded from Stanmakephysigs.com March 2024 Common Test SECTION A 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 1.1.3) in the ANSWER BOOK, for example 1.1.4 D. 1.1.1 The pistil consists of the ... stigma, style and ovary. stigma, petal and ovary. style, petal and stamen. stigma, style and petal. 0QOWDD>Y 1.1.2 Antibodies are proteins that ... break down pathogens. catalyse reactions. bind with specific antigens. are produced by T-cells that kill disease-causing viruses. 0QOWD>Y 1.1.3 The following is a list of statements about sexual reproduction in plants. (i) It generates variation in unstable environments (ii) Seeds facilitate dispersal of offspring to more distant locations (iil) | Seed dormancy allows growth to be suspended until harsh conditions are reversed (iv) | Offspring can be produced rapidly Which ONE of the following is a combination of advantages of sexual reproduction in plants? A (i), (ii), (iii) and (iv) B (i) and (iv) Cc (ii), (iii) and (iv) D (i), (ii) and (iii) (3 x 2) (6) Copyright Reserved Please Turn Over

Life Sciences Swnloaded from Stanmakephysigs.com March 2024 Common Test 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 1.2.4) in the ANSWER BOOK. 1.2.1 The concentration of sense organs at the anterior end of an animal leading to the formation of a head region. 1.2.2 Dominant generation in the life cycle of ferns. 1.2.3 Whip-like structures which are used for movement in bacteria. (3 x 1) (3) 1.3. 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 II 1.3.1 Animals that have a true body cavity | A: Acoelomate B: Coelomate 1.3.2 Characteristic of moss plants A: Thallus B: Hyphae (2 x 2) (4) Copyright Reserved Please Turn Over

March 2024 Common Test “eS°#36ivnioaded from Stanmagephysigs.com 1.4 The diagrams below represent the body plans of different phyla. 1.4.1 Identify part: (a) A () (b) B (1) () Cc () 1.4.2 Name TWO phyla that are represented by the body plan Y. (2) 1.4.3 Give the LETTER of the diagram (X or Y) that represents: (a) A diploblastic (1) (b) | An acoelomate (1) (7) [20] Copyright Reserved Please Turn Over

Life Sciences March 2024 Common Test Swnloaded from Stanmakcephysigs.com SECTION B QUESTION 2 2.1 The diagram below represents the development of groups of plants over a period. o no 4 ® 2 a fa £ Ss a Q a Q £ [o) fe) QD S 2 z E Q £ fa ao) > 2 0 o) ao a (0) < => Cenozoic} = 1007 2 2 Q A g 2007 = Fag & 300 4 c 2 = 404 2 c g D 3 500] « & E 600 + Algae 2.1.1 Name the kingdom to which the algae belongs. (1) 2.1.2 Name TWO plant divisions that were the first to exist in the Palaeozoic era. (2) 2.1.3 State how long ago did the seed plants arise on earth? (2) 2.1.4 Name ONE characteristic that is shared by Gymnosperms and Angiosperms that makes them closely related. (1) 2.1.5 Name the LETTER that represents? (a) Vascular tissue (1) (b) Seeds (1) 2.1.6 Name the group that is considered to be the ancestor of all land plants from the diagram above? (1) (9) Copyright Reserved Please Turn Over

Life Sciences Swnloaded from Stanmakephysigs.com March 2024 Common Test 2.2 Read-the passage below. Tuberculosis is the leading cause of death Tuberculosis (TB) is caused by the bacterium Mycobacterium tuberculosis, which mostly affects the lungs and other organs in the human body. Bacteria are prokaryotic organisms. They survive more in people with a weakened immune system such as people living with the HI virus. TB is South Africa’s leading cause of death. HIV infection is a key factor in the TB epidemic. HIV sufferers have a higher risk of contracting TB and a greater chance of dying as they have a weaker immune system. 2.2.1 Name the bacterium that causes TB. (1) 2.2.2 State ONE reason why bacteria are considered prokaryotic? (1) 2.2.3 State whether virus is cellular or acellular. (1) 2.2.4 Give areason for your answer in QUESTION 2.2.3. (1) 2.2.5 Explain why HIV patients have a higher risk of contracting TB and dying. (2) (6) [15] Copyright Reserved Please Turn Over

Life Sciences March 2024 Common Test Swnloaded from Stanmaxephysigs.com QUESTION 3 3.1. Scientists conducted an investigation to determine the effect of different treatments on the amount of fungi that grows on bread. The procedure was as follows: Five slices of bread were used and treated in different ways. Slice 1: was left dry Slice 2: added 20 mf tap water Slice 3: added 20 mf lemon juice Slice 4: added 20 mf sugar water Slice 5: added 20 mf bleach Each slice was placed in a zip-lock bag and kept in a cupboard for one week. e After one week the slices were removed from the zip-lock bags and were observed the growth of the fungi. e The percentage area covered by fungi in slices was calculated. The results are shown in the table below. AREA COVERED BY FUNGI (%) 0 25 30 80 10 TREATMENT ON.BREAD 3.1.1 Name the independent variable of the investigation. (1) 3.1.2. Give ONE reason why the zip-lock bags were placed in a dark cupboard for one week? (1) 3.1.3 Explain why the dry bread was included in the experiment. (2) 3.1.4 State ONE way that the scientists can improve the reliability of the investigation. (1) 3.1.5 Explain why fungi grows best on bread sprinkled with sugar water. (2) 3.1.6 Give TWO ways in which the scientists ensured the validity of the results of this investigation. (2) (9) Copyright Reserved Please Turn Over

March 2024 Common Test “S*6wnloaded from Stanmagepbysias.com 3.2 | The-diagrams below show organisms that belong to two different phyla. 3.2.1 Name the kingdom to which both organisms belong. (1) 3.2.2 State the phyla to which organism A belongs. (1) 3.2.3 Give the type of symmetry of organism B? (1) 3.2.4 Describe the role of organism B as a decomposer. (1) 3.2.5 Identify the type of gut in the following two organisms: (a) A (b) B (2) (6) [15] TOTAL SECTION B: 30 GRAND TOTAL: 50 Copyright Reserved

Downloaded from Stanmorephysics.com KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 11 MARKS: 50 Copyright Reserved This marking guideline consists of 4 pages. Please Turn Over

Life Sciences ownloaded from Stanneoraphysies.com SECTION A QUESTION 1 11 1.1.1 AVY 1.1.2 Cvv 1.1.3 DVY 1.2 1.2.1 Cephalisation’ 1.2.2 Sporophytev 1.2.3 Flagella/flagellumv 1.3 1.3.1 B only¥v 1.3.2 A only¥v 1.4 1.4.1 (a) ectoderm v (b) gut v (c) | coelom ¥ 1.4.2 - Annelida v - Arthropoda v - Chordata v (mark first TWO only) 1.4.3 (a) Xv (b) xv Copyright Reserved March 2024 Common Test (3 x 2) (6) (1x 3) (3) (2 x 2) (4) (1) (1) (1) (2) (1) (1) (7) TOTAL SECTION A: [20] Please Turn Over

Life Sci ICES March 2024 Common Test ownloaded from Stanmoraphysias.com SECTION B QUESTION 2 2.1. 2.1.1 Protista Vv (1) 2.1.2 = Charophytes v - Bryophytes v (mark first TWO only) (2) 2.1.3 350 Vv MYAY (2) 2.1.4 Presence of seeds Vv (1) 2.1.5 (a) Dv (1) (bo) Cv (1) 2.1.6 Algae v (1) (9) 2:2 2.2.1 Mycobacterium ¥ (1) 2.2.2 - Lack of nucleus ¥ - Does not have membrane bound organelles v (mark first ONE only) (1) 2.2.3 Acellular ¥ (1) 2.2.4 - non-livingY - lack of cellular structures ¥ - lack of most organelles found in a cell ¥ Any (1) 2.2.5 HIV lowers the body’s immunity” / white blood cell count therefore it cannot defend the body against TB ¥ (2) (6) [15] Copyright Reserved Please Turn Over

Life Sciences March 2024 Common Test ownloaded from Stanmoraphysias.com QUESTION 3. 3. 3.1.1 Treatment v on bread (1) 3.1.2. Fungi grow best in dark and warm placesY (mark first ONE only) (1) 3.1.3 - Act asa control v - To compare results between treated and not treated bread. v (2) 3.1.4 - Increase sample size Vv - Repeat investigation v (mark first ONE only) (1) 3.1.5 - Sugar provides energy/food v - For fungi therefore more food will allow fungi to grow faster ¥ (2) 3.1.6 - placed bread in zip | - all slices left for oneW z - slices of bread of the - same amount/quantity (200m of treatmentY (mark first TWO only) (2) (9) 3.2 3.2.1 Animalia ¥ (1) 3.2.2 Cnidaria ¥ (1) 3.2.3 Bilateral ¥ (1) 3.2.4 They decompose/ break down dead organic material v (1) 3.2.5 Cnidaria - blind gut V (1) Annelids- through gut “ (1) (6) TOTAL QUESTION 3: [15] GRAND TOTAL: 50 Copyright Reserved