Life Sciences Grade 11 KZN June 2025 Paper & Memo

Testpapers.co.za KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE MARKS: 150 TIME: 2% hours N.B. This question paper consists of 17 pages. Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 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. s 5: Present your answe} > i structions of each question. 6. Do ALL drawings in pencil al 1em in blue or black ink. ly when asked to do so. 8. The diagrams in this que tion OT 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

Testpapers.co.za 2025 June Examinations SECTIONA QUESTION 1 1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A — D) next to the question numbers (1.1.1 to 1.1.8) in the ANSWER BOOK, e.g. 1.1.9 D. 4.1.14 The function of hydrogen atoms during oxidative phosphorylation is to... A se to form carbon molecules. B e to form oxygen. a to form carbonic acid. QUESTION 1.1.; A BASED ON THE DIAGRAM BELOW 1.1.2 During biotechnology the part that is used to produce a hormone that decreases glucose level in blood: lekek 2 hwON= 1.1.3. The visible feature that classifies the above diagram as prokaryote is the... absence of both cell membrane and definite nucleus. presence of definite nucleus. presence of cell membrane. absence of definite nucleus. woke. Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 1.1.4 Below is a list of characteristics of a flower. (i) Flowers are usually small without petals (ii) They produce a small amount of pollen grain (iii) Pollen grains are light, smooth and dry (iv) The stigma is large and feathery Which ONE of the following is a CORRECT combination of characteristics of wind pollinated flowers? A (i), (ii) and.(iv) only B (i), (ii), @ ) Cc (i), and{ D (i), (iii) 1.1.5 The diagram be muscle tissue of an athlete during comrade marathon. Muscle tissue Which ONE of the following statements describe what happens in the muscle at point X during anaerobic respiration? Lactic acid level decreases ATP level increases Lactic acid level increases Glucose level increases leKons > Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 1.1.6 The table below shows gases released and product formed. Which ONE of the following best describes the type of gas released and product formed during light reaction of photosynthesis? Gas released Product A_| Carbon dioxide Hydrogen B_ | Oxygen Hydrogen C_ | Hydrogen Carbon dioxide D_ | Carbon dioxide = Oxygen Sate 1.1.7 The diagrai I C ] paratus used in germination of seeds Which ONE of the following is a suitable control for this investigation? Flask A has glass beads, cotton with (KOH) and thermometer Flask A has cotton wool with KOH and thermometer Flask B has many peas seeds and thermometer. Flask B has peas seeds instead of glass beads. leKen: iP -2 Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 1.1.8--The graph below shows antibodies concentration that are present in the body after exposure to Antigen A. Second exposure to we Antigen A Which ONE of the following statements is CORRECT regarding antibody concentration at different times of exposure to Antigen A? A _ First exposure to Antigen A and second exposure results in same antibody concentration. B Both times of exposure to Antigen A have no effect in antibody concentration. C__ First exposure to Antigen A stimulate the antibody concentration more than the second exposure. D Second exposure to Antigen A stimulate the antibody concentration more than the first exposure. (8 x 2) (16) Copyright Reserved Please Turn Over

12 1.3 Copyright Reserved Testpapers.co.za Give the correct biological term for EACH of the following descriptions. Write only the term next to the question number (1.2.1 to 1.2.9) in the ANSWER BOOK. Aes The blood vessel that transports absorbed nutrients from the small intestine to the liver 1.2.2 Adigestive cavity which has one digestive opening 1.2.3. Finger like projections in the small intestine that increases surface area for absorption. 1.24 — Flap-like ste which prevents food from entering the trachea mm = | 1.2.5 Germ layer respot \ the development of epithelial lining of the digestive tract | 1.2.6 Group of plants that presuce seeds 1.2.7 Ability of the body to maintain an internal environment constant despite changes in the external environment 1.2.8 Process where protozoa engulf and digest large food particles 1.2.9 Part of a flower which become a fruit after fertilisation 1.2.10 The amount of extra oxygen the body needs to recover from strenuous exercise (10 x 1) 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 1.3.3) in the ANSWER BOOK. COLUMN | COLUMN II 1.3.1 | Triploblastic organism A: Cnidaria B: Porifera 1.3.2 | Produces antibodies A: Lymphocytes B: Red blood corpuscles 1.3.3. | Secrete hydrochloric acid A: Gall bladder B: Stomach (3 x 2) 2025 June Examinations (10) (6) Please Turn Over

Testpapers.co.za 2025 June Examinations 1.4. The diagram below hows a cell organelle responsible for cellular respiration. A B c D 1.4.1 Identify: (a) PartA (1) (b) Gas Y (1) (c) Molecule X (1) 1.4.2 Give the LETTER and NAME of the part that: (a) | Contains enzymes responsible for production of energy carriers (2) (b) _ Is folded to increase the surface area for attachment of enzymes (2) 1.4.3. Name the phase of aerobic respiration that: (a) | Occurs outside the organelle shown above. (1) (b) | Releases energized hydrogen atoms and carbon dioxide. (1) 1.4.4 Give TWO end products of aerobic respiration in muscle cells. (2) (11) Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 1.5 The diagram below represents a moss plant. 1.5.1 1.5.2 1.5.3 1.5.4 1.5.5 Identify part: (a) A (1) (b) B (1) State the phylum to which the above plant belongs. (1) Name the dominant generation in moss plant. (1) Give the LETTERS that represent the alternation of generation mentioned in QUESTION 1.5.3. (2) Name the part that absorb water and nutrients in moss plant. (1) (7) TOTAL SECTION A: 50 Copyright Reserved Please Turn Over

Testpapers.co.za SECTION B QUESTION 2 2.1 The diagram below shows the human digestive system. 2.1.1 Give the LETT e part that: (a) Secretes enzyme amylase which help in the digestion of starch (b) Absorbs water and any remaining absorbable nutrients 2.1.2 Describe the structural suitability of part C during peristalsis. 2.1.3. Gastroparesis is a condition that affect the muscles of Part D which results in food remaining in Part D for long period of time. Explain how this condition may lead to weight loss. 2.1.4 Describe the process of digestion in part A if a person eats cooked beef meat. 2025 June Examinations (2) (2) (2) (3) (4) (13) Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 2.2 Read the extract below. THE RELEVANCE OF PHOTOSYNTHESIS TO ALL LIVING THINGS Photosynthesis is essential to all life on earth. It is the only biological process that can capture energy that originates in outer space (sunlight) and convert it into carbohydrates that every organism uses to power its metabolism. The energy extracted today by the burning of coal and petroleum products represents sunlight energy captured and stored by photosynthesis almost 200 million years ago. The Earth has concentration of carbon dioxide of approximately 0.04%, re. However, studies on plant growth have found plants ronments with 4% carbon dioxide. 2.2.1 Name the organ feen plants that is responsible for the process (1) above. bt lis 2.2.2 Explain TWO ways in which the organelle mentioned in QUESTION 2.2.1 is structurally suitable for photosynthesis (4) 2.2.3 From the extract, state: (a) TWO sources of energy captured and stored by photosynthesis. (2) (b) The organic compound that is formed during photosynthesis. (1) 2.2.4 According to the extract “...studies on plant growth have found plants perform better in environments with 4% carbon dioxide...” How many times greater is this concentration of carbon dioxide compared to earth’s atmosphere? Show ALL your workings. (2) (10) Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 2.3. The diagram below represents parts of digestive system which regulates high glucose level in blood. i = 2.3.1 Identify each (a) Organ A (b) Gland C_ (c) Hormone B (1) (1) (1) 2.3.2 Name the disorder which can be caused by the insufficient release of hormone B. (1) 2.3.3. State why Gland C is regarded as an endocrine gland. (3) 2.3.4. Give TWO functions of organ A in maintaining the glucose level in the blood. (2) (9) 2.4 The diagram below shows organisms of phylum Arthropoda. 2.4.1 Identify the type of skeleton found (1) 2.4.2 State TWO disadvantages of the type of skeleton mentioned in QUESTION 2.4.1. (2) 2.4.3. Explain TWO advantages of the fluid-filled cavity that develops in the mesoderm of the organisms in this phylum. (4) (7) Copyright Reserved Please Turn Over

Testpapers.co.za 2.5 Aninvestigation was conducted to determine the effect of Bacillus Calmette- Guerin (BCG) vaccine on preventing both TB infection and disease. The procedure was as follows: 20 healthy young people without TB were selected. Participants were divided into two groups, of ten people each. In ONE group, each person was injected with 0.1 ml of Bacillus Calmette- Guerin and the OTHER group, no injection of BCG was administered. e Both groups were exposed to an area where TB was high and hygienic practices were absent, for two months. e Their blood samples were‘tested (Interferon-Gamm: as ) infection. The results were recorded e end of each month using the RA, a technique used to detect TB = ae x... GROUP A GROUP B Time of testing blood | | First. | Second First Second sample month month month month Average level of TB bacterium in blood 34 121 0 0 (cells/mcL) 2.5.1 Name the bacterium that causes TB. 2.5.2 State TWO: (a) criteria that were used to select the participants for the investigation to ensure validity. (b) ways in which the reliability of the investigation was ensured. 2.5.3 Identify the group which was injected with BCG? 2.5.4 Use the information in the table above to explain your answer to QUESTION 2.5.3. 2.5.5 Antibiotics are prescribed medication for treatment of TB. However, the Copyright Reserved TB bacterium may become resistant to this medication. Explain why bacteria becomes resistant to antibiotics after a period of time. TOTAL QUESTION 2: 2025 June Examinations (1) (2) (2) (1) (3) (2) (11) 50 Please Turn Over

Testpapers.co.za 2025 June Examinations QUESTION 3 3.1. The diagram below shows a structure of a Rhizopus sp. and its life cycle. 3.1.1. Identify part: (a) A (1) (b) ¢ (1) 3.1.2 Name the reproductive process which produces structures labelled B (1) 3.1.3. Describe the role of fungi in plant growth (2) 3.1.4. Rhizopus sp. is a heterotroph. Name the type of nutrition that occurs in the fungus above. Give a reason for your answer. (2) 3.1.5 Give ONE economic importance of fungi (1) (8) Copyright Reserved Please Turn Over

Testpapers.co.za 3.2. The diagrams below represent different plant groups. Pollen grains DIAGRAM 3 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 Copyright Reserved Name the plant group that contains horizontal, underground stem. Using diagram NUMBERS (1, 2 ,3) showing different plant groups, arrange the diagrams above in the sequence as they appear on earth. Explain TWO: (a) ways on how part A is suitable for its function. (b) visible reasons why there is an increased chance of pollination in DIAGRAM 1. Describe how the plant group in DIAGRAM 2 is able to reproduce effectively using reproductive structure D. Explain the importance of part C in the plant’s energy production. Fern plants are larger than moss plants. Most of them are small shrubs 30 cm to 100 cm in height. However, some ferns are much taller trees. Explain why fern plants grows taller than moss plants. 2025 June Examinations (1) (2) (4) (4) (2) (3) (3) (19) Please Turn Over

Testpapers.co.za 3.3. The phylogenetic tree below shows a possible evolutionary relationship within animal diversity as represented from A to E. 2025 June Examinations Porifera Cnidaria Platyhelminthes Annelida Arthropoda Chordata A 3.3.1 Name the: (a) only phylum that remains attached to a substrate for most of its life. (b) TWO phyla that are more closely related. 3.3.2 Write down ONLY the LETTER that represents each of the following characteristics or description of animal diversity: (a) accumulation of sense organs in the anterior end. (b) arrangement of body structures in relation to some axis of the body. (c) presence of notochord. 3.3.3 State TWO roles of organisms that displays characteristic D in the ecosystem and agriculture. (1) (2) (1) (1) (1) (2) (8) Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examinations 3.4 Nymphoides thunbergia are green aquatic plants with submerged roots and floating leaves that hold the small flowers above the water surface. Grade 11 learners conducted an investigation to determine the effect of carbon dioxide concentration on the rate of photosynthesis in Nymphoides thunbergia plant. The procedure was as follows: e —Nymphoides thunbergia plant was placed upside down in a test tube containing natural water in a dark room. ¢ Sodium bicarbonate (NaHCOs3) was added in the water to give a constant saturated solution of carbon dioxide. e The time taken for the release of ubbles was recorded. This is the rate of photosynthesis at that particul ar concentration of carbon dioxide. e The procedure was repeatediat different carbon dioxide concentrations by using different dilutions of saturated Solution. e Rate of a reaction decreases as time increases. The results are recorded in the table below. SODIUM BICARBONATE TIME TAKEN TO PROCEDURE (NaHCOs) RELEASE BUBBLES CONCENTRATION imol/L) Hw fs (SECONDS) . 0. 6 ies 7 n ‘Pa 1.2 2.4 3.1 3.5 3.7 4.0 NO] R Oly] 3.4.1 Identify the independent variable. (1) 3.4.2 State why the experiment was placed in a dark room. (2) 3.4.3. Explain why the time taken to release bubbles remains constant after 3.5 mol/L concentration of NaHCOs. (4) 3.4.4 Write down the conclusion for this investigation. (2) 3.4.5 Plot a bar graph to represent the data in the table from procedure 1 to 4. (6) (15) TOTAL SECTION B: 100 GRAND TOTAL: 150 Copyright Reserved

Testpapers.co.za nwa KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE MARKS: 150 This question paper consists of 10 pages including this page. Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examination PRINCIPLES RELATED TO MARKING LIFE SCIENCES JUNE 2025 10. 11. 12: If more information than marks allocated is given Stop marking when maximum marks are 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 Ce of it is required Read all and credit relevant part. | y i| If comparisons are ra and descriptions are given Accept if 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 unrecognized abbreviation but credit the rest of 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 recognizable accept provided it does not mean something else in Life Sciences or if it is out of context. Copyright Reserved Please Turn Over

13. 14. 15. 16. 1h 18. Testpapers.co.za 2025 June Examination If common names given in terminology Accept provided it was accepted at the National memo discussion meeting. If only letter is asked for and only name is given (and vice versa) No 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. he Caption All illustrations (diagrar etc.) must have a caption Code-switching of offici ! ages ( erms and concepts) A single word or two tha ars in any official language other than the learners’ assessment language greatest extent in his/her answers should be credited, if it is correct. A marker that is proficient in the relevant official language should be consulted. This is applicable to all official languages. Copyright Reserved Please Turn Over

SECTION A QUESTION 1 4.1 19 Ya, 1.1.3 1.1.4 1.1.5 1.1.6 Ate 1.1.8 42 © ©1.2:4 1.252: 1.2.3 1.3 1.3.2 1.3.3 14 1.4.1 1.4.2 1.4.3 1.4.4 Testpapers.co.za | ag Byy Dvv Dvv C/Dvv Byy AVY Dvv Hepatic portal v Blind gutv Villiv A only ¥¥ B only Vv (a) Outer membrane v (b) Oxygen ¥ (c) Pyruvic acid ¥ (a) C ¥ Matrix v (b) D Y Cristae v (a) Glycolysis Vv (b) Krebs cycle ¥ - Carbon dioxide v - Water v - Energy/ATP v (Mark first TWO only) Copyright Reserved 2025 June Examination (8x2) (16) (8) (3x2) (6) (1) (1) (1) (2) (2) (1) (1) Any (2) (11) Please Turn Over

Testpapers.co.za 1.5 1.5.1 (a) Capsule v (b) No answer 1.5.2 Bryophyta / Bryophytes v 1.5.3. Gametophyte v 1.5.4_No answer 1.5.5 Rhizoid v TOTAL SECTION A: SECTION B QUESTION 2 2.1 2.1.1 (a) By Salivary glandv OR Fy Small intestinev (b) Ev Large intestineY 2.1.2 - contain (circular and longitudinal) musclesY - that relaxes and contractY - to push the food downwardsY Any 2.1.3 ent of digest om the stomach/part D to the small oduction/storage of excess nutrients” Any ds teethy down into small beef particles”. 2025 June Examination (1) (1) (1) (1) (4) 45 (2) (2) (2) (3) (4) (13) Copyright Reserved Please Turn Over

22 (122A 2.22 2.2.3 2.2.4 2.3 2.3.1 2.3.2 2.3.3 2.3.4 24 24.1 2.4.2 2.4.3 Testpapers.co.za 2025 June Examination Chloroplast’ (1) - grana contain chlorophyllY to trap sunlightv -has lamellae/thylakoidsv that present a large surface area for absorption of sunlight” - double membrane is (selectively) permeablev allowing water and carbon dioxide to enter easily” - stroma contains enzymes/ribosomesv for photosynthesis ~ - Starch granule for storage of starchy (Mark first TWO only) Any (2 x 2) (4) (a) - burning of coalv - petroleum f (Mark fi Any (2) — ~ (b) carbohydrate: (1) : v =100 004f 0° % (2) (10) (a) LiverY (1) (b) Pancreasv (1) (c) Insulin’ (1) diabetes mellitusY (1) - do not have ductsY - secretes hormonesv / insulin and glucagon - directly into the bloodY (3) - it is stimulated to convert glycogen back into glucose” - it is stimulated to convert excess glucose into glycogenv (2) (9) ExoskeletonY (1) - cannot stretchy / provides restriction on growth - during moulting animal can dry out v / vulnerable to predators (2) - provide spacev for development of internal organsv - separates gut wall from body wall” to function independently” - reduces energy consumption for circulation’ (2 x 2) (4) (7) Copyright Reserved Please Turn Over

25 2.5.1 2.5.2 2.5.3 2.5.4 2.5.5 Testpapers.co.za Mycobacterium tuberculosis v (a) (b) By Copyright Reserved - participants were young ” - participants were healthy ~ / without other diseases - investigation was conducted for 2 months Vv - 10 people in each group v areas where TB is high Vv lood for group B was 0 ¥ in first a n blood for Group A was 34 in second m ge level of TB in blood for group B remained at | ie level of TB in blood for Group A this show tha TB infection effective in preventing Any incomplete treatment courses/ stopping medication prematurely v allows the TB bacteria to survive and multiply Y resulting to drug resistance taking incorrect dosage of antibiotics v can allow the bacteria to surviveY and develop resistance using substandard antibiotics v can result in ineffective treatment contributing to the development of resistance “ (Mark the first TWO only) Any TOTAL QUESTION 2 2025 June Examination (1) (2) (2) (1) (3) (2) (11) 50 Please Turn Over

QUESTION 3 3.1 3.1-1 3.1.2 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 Copyright Reserved Testpapers.co.za (a) Sporangium v (b) Sporangiophore v Asexual reproduction “ + act as decomposers ¥ - breaking down organic matter making nutrients accessible to plants Vv - form symbiotic relationship wi with plant roots increasing surface area for nutrient absorp ” (Mark the firs Any - saprophytic v - obtain nutrients ecaying bread Vv - Production of cheese ead/beer/wine (Mark the y) Any Pteridophytesv 3-2-1vv (a) - sticky V / contains hairs to trap pollen grain V - bilobed / large surface v to receive pollen grain ¥ (b) - pollen grain is in close proximity with the stigma v to ensure that - the p alist grain land.sue ce lly into the stigma v enc pollinators/b due to large visible petals 3 its V/bees the ovules and developing - since the se eI a fruit ¥ (Mark the } Any - ‘responsib le for pho tosyn esis - which convert light energy into sugars/glucose “ - has conducting tissues/vascular system Vv for efficient transport - of water and minerals to upper parts of the plant v - has supporting and strengthening tissueY - keeping the plant upright v Any 2025 June Examination (1) (1) (1) (2) (2) (1) (8) (1) (2) (4) (4) (2) (3) (3) (19) Please Turn Over

Testpapers.co.za 2025 June Examination 3.3. 3.3.4-(a) Poriferav (1) (b) - Annelida v - Arthropoda ¥ (2) (Mark the first TWO only) 3.3.2 (a) Cv (1) (b) Av (1) (c) Ev (1) 3.3.3. - actas pollin - play role in dec Y / aerating the soil (2) (8) 3.4 3.4.1. carbon dioxide concentration Vv (1) 3.4.2 No answer 3.4.3. - sodium bicarbonate/NaHCOs concentration is increasing Vv - to release more/high carbon dioxidev - the rate of photosynthesis remains at 40 v - due to COz toxic effects v / denaturation of enzymes and other limiting factors Vv Any (4) 3.4.4 - at low carbon dioxide concentration, the rate of photosynthesis is low Vv OR - increasing carbon dioxide concentration, increases the rate of photosynthesis vv Any (2) Copyright Reserved Please Turn Over

Testpapers.co.za 2025 June Examination 3.4.5 < Time taken to | bi 200 2 150 2a eu - & 100 3 3 - ~ O D CO o i Eo = 12 24 34. onate concentration (mol/L) Criteria for e i Criteria ition Mark Correct type of graph (T) Bar graph drawn 1 Caption of the graph (C) Both variables included 1 Axes labels (L) X and Y axis correctly labelled with 1 units Scale for X-axis (S) - Equal space and width of bars for 1 X-axis and - Correct scale for Y-axis Plotting co-ordinates (P) -1 to 3 co-ordinates plotted correctly 1 - All 4 required co-ordinates plotted correctly 2 (6) (13) TOTAL SECTION B: 98 GRAND TOTAL: 143 CONVERSION TABLE Mark obtained Mark Added 138 - 143 +7 120 - 137 +6 102 - 119 +5 88 - 101 +4 76 - 87 +3 52-75 +2 37-51 +1 0-36 +0 Copyright Reserved Please Turn Over