Life Sciences Grade 11 P1 NSC Prelim 2022 Question Paper

) KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 11 eee : LIFE SCIENCES * : COMMON TEST ; i SEPTEMBER 2022 : MARKS: 60 TIME: 1 hour This question paper consists of 9 pages.

2 Life sciences Grade 11 Common Test September 2022 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. Do 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 may use a non-programmable calculator, protractor and a compass. Write neatly and legibly. Copyright reserved Please turn over

3 Life sciences Grade 11 Common Test September 2022 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 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 following are density dependent factors that can affect population size, except ... A predation. B competition. C volcanoes. D spread of disease. QUESTION 1.1.2 AND 1.1.3 REFER TO THE DIAGRAM SHOWING THE HUMAN THORAX BELOW. Copyright reserved Which ONE of the following combinations is correct labels for A, B and D respectively? A _ Larynx, Rib cage, Bronchiole B Bronchus, Lung, Alveolus Cc Trachea, Lungs, Alveolus D Larynx, Intercostal muscles, Bronchiole Which ONE of the following correctly refers to structure function of structure C in the diagram above? A During inhalation it contracts and during exhalation it contracts B During inhalation it contracts and during exhalation it relaxes C During inhalation it relaxes and during exhalation it contracts D During inhalation it relaxes and during exhalation it relaxes. Please turn over

4 Life sciences Grade 11 Common Test September 2022 (3x2) (6) q2 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. 21 The relationship between two species that live in close contact with each other for part or all their lives 1.2.2 The control of water content in the blood 1.2.3 Movement of individuals of a population out of a habitat 1.2.4 The blood vessel that carries oxygenated blood filled with waste to the kidney. (4x1) (4) 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 1.3.3) in the ANSWER BOOK. COLUMN | COLUMN II 1.3.1 | One of the species benefits and the | A: Commensalism other is unaffected B: Mutualism 1.3.2 | Carries urine from the kidney to the | A: Ureter bladder B: Urethra 1.3.3] Number of organisms of a particular |] A: Census kind that can be supported by]|B: Population density resources in the environment (3x2) (6) Copyright reserved Please turn over

Life sciences 5 Grade 11 Common Test September 2022 1.4 The population pyramid below represents the age and gender distribution in South Africa in the year 2020 10% 8% 6% 4% 2% 0% 2% 4% 6% 8% 10% South Africa — 2020 Population 59,308,689 1.4.1 1.4.2 1.4.3 1.4.4 Copyright reserved State whether South Africa is a developed or developing country, by referring to the pyramid above. State ONE visible reason for your answer in QUESTION 1.4.1. Identify the gender that lives the longest from the pyramid. Give ONE feason why the South African government must have access to this population pyramid. TOTAL SECTION A: Please turn over (1) (1) (1) (4) 20

6 Life sciences Grade 11 Common Test September 2022 SECTION B QUESTION 2 2.1 The diagram below represents the structure of the nephron. ve b 7 v / foc ve ( \ 2.1.1 Identify part: (a) A (1) (b) B (1) 2.1.2 Identify the process indicated by: (a) 1 (1) (b) 2 (1) 2.1.3. Explain presence of proteins in the substance passing through C about the functioning of the nephron. (2) (6) 22 Name the hormone responsible for regulating water in the blood and describe its role when there is a shortage of water in the blood. (5) Copyright reserved Please turn over

Life sciences 7 Grade 11 Common Test September 2022 2.3 Read the extract below. Sable antelope are grazers (feeding on grasses). They live in herds of up to 25 members. Young Sable antelope are vulnerable to predation by lions, hyenas, leopards, and crocodiles. There is competition amongst the members of the Sable antelope population. Sable antelope prefer to feed during the day because of high risk of predation at night. Sable antelope also 2.3.1 Name the type of competition that occurs between the members of Sable antelope population. 2.3.2 State ONE resource mentioned in the passage that members of Sable antelope can compete for. 2.3.3 Give ONE reason why feeding during the day increases Sable antelopes’ chances of survival. 2.3.4 Explain why chances of the population of the Sable antelope and the population of their predators reaching carrying capacity are limited. 2.4 The population of species Z was determined in a particular area and the results are illustrated in the table below. Number captured, marked | Number captured in Number marked in the and released in the first the second sample- recaptured second sample (C) sample 23 29 11 2.4.1 Name the technique used to determine the population of species Z. 2.4.2 Copyright reserved Estimate the total population of species Z in the area using the formula: P=MxC R Show all working. Please turn over (1) (1) (1) (2) (5) (1) (4) [20]

8 Life sciences Grade 11 Common Test September 2022 QUESTION 3 3.1 Grade 11 learners carried out an investigation to determine the effect of physical activity on the heart rate and breathing rate of humans. The procedure for the investigation was as follows: They chose five learners of the same age to participate in their investigation e They measured the heart rate and breathing rate of each learner before the physical activities The learners each walked a distance of 5km and also ran a distance of 5km They measured the heart rate and breathing rate of each learner after walking and running. The table below shows the result of their investigation. Physical activity | Average heart rate | Average breathing rate (beats per minutes) | (breaths per minute) Rest 71 12 Walking 88 13 Running 120 qe 3.1.1 Identify the independent variable in the investigation. S12 State TWO planning steps the learners considered for this investigation. 3.1.3 State ONE way in which the learners ensured validity of their investigation. 3.1.4 State the effect of running on the breathing rate, using the results in the table above. 3.1.5 Explain your answer in QUESTION 3.1.4. 3.1.6 Caiculate the difference in the learner’s heart rate between rest and running. 3.1.7 State the conclusion that can be drawn from the result of the Copyright reserved investigation. Please turn over (1) (2) (1) (1) (2) (2) (2) (11)

9 Life sciences Grade 11 Common Test September 2022 3.2 The graph below shows the growth pattern of a population over time. a Population Size > O24 Name the type of growth form shown in the graph. (1) 3.2.2 Identify phase 1 and state a reason for your answer. (2) 3.2.3 Identify the phase from the graph above where: (a) natality is equal to mortality (1) (b) — population growth is the fastest (1) (c) environmental resistance comes into effect (1) (d) natality exceeds mortality to the greatest extent (1) 3.2.4 Explain why it may take longer for the human population to reach the type of growth shown above. (2) (9) [20] TOTAL SECTION B: 40 GRAND TOTAL: 60 Copyright reserved