Life Sciences Grade 10 KwaZulu Natal June 2017 Paper & Memo

Education REPUBLIC OF SOUTH AFRICA / LIFE SCIENCES i COMMON TEST JUNE 2017 RE RAAS EES NATIONAL SENIOR CERTIFICATE MARKS: 150 TIME: 2'/2 hours N.B. This question paper consists of 15 pages. Copyright Reserved KwaZulu-Natal Department of Education SRAM SARARABSE EES EAN ESAS ERE RARER g Please Turn Over

Life Sciences Downloaded from h layiso .cO The 2017 Common Test Grade 10 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 must use a non-programmabie calculator, protractor and a compass, where necessary. Write neatly and legibly. Copyright Reserved Please Turn Over

Life Sciences Downloaded from hlayiso.com June 2017 Common Test Grade 10 SECTION A QUESTION 1 1.1 Various options are provided as possible answers to the following questions. Choose the correct answer and write only the letter (A to D) next to the question number (1.1.1 to 1.1.7) in your ANSWER BOOK, for example 1.1.8 D. 1.1.1 Copyright Reserved Which ONE of the following blood vessels is responsible for carrying blood away from the right ventricle? A Pulmonary vein B Coronary artery Cc Pulmonary artery D Suerior vena cava In which phase does cytokinesis start to take place? A Metaphase B Prophase Cc Anaphase D Interphase Which chemical reagent is used to test for the presence of glucose in a food sample? A lodine solution B Alcohol Cc Millon’s reagent/Biuret solution dD Benedict’s solution/Fehlings A and B The blood from the pulmonary vein enters the heart at the ... A left atrium. B right atrium. Cc left ventricle. D right ventricle. Which ONE of the following combinations of organic compounds contains carbon, hydrogen and oxygen only? A Carbohydrates and proteins B Lipids and proteins Cc Proteins and glucose D Glucose and starch Please Turn Over

Life Sciences Downl oaded from hlay iSO. co Mune 2017 Common Test Grade 10 1.1.6 Study the diagram below showing leaves that have been treated in various ways during an investigation on transpiration, then answer the questions that follow. Leaf A — coated with Vaseline on both sides. Leaf B — coated with Vaseline on the lower surface only Leaf C — coated with Vaseline on the upper surface only Leaf D — uncoated Which one of the following leaves will lose water most rapidly? A Leaf A B Leaf B Cc Leaf C D Leaf D 1.1.7. The diagram shows a longitudinal section of a vein. 1 valve The direction of blood flow will be from ... 4 to 2 and 2 to 3. 3 to 2 and 2to1. 2 to 1 and 2 to 3. 1 to 2 and 3 to 2. uOW> (7x2) (14) Copyright Reserved Please Turn Over

Life Sciences Grade 10 Downloaded from hlayiso.cor une 2017 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 1.2.8) in the ANSWER BOOK. 1.2.1 The plant tissue that actively divides by mitosis to form new cells 1.2.2 The loss of water droplets through the pores of leaves as a result of root pressure and high humidity 1.2.3 Apparatus used to measure the rate of transpiration 1.2.4 The opening at the base of the skull through which the spinal cord passes 1.2.5 The membranes which enclose and protect the heart 1.2.6 The chamber in the heart that receives oxygenated blood from the left atrium 1.2.7 The combination of autumn wood and spring wood formed in a single year through secondary thickening 1.2.8 Vessels that return components of tissue fluid back to the blood system 1.3 Indicate whether each of the statements number (1.3.1 to 1.3.4) in the ANSWER BOOK. (8x1) (8) in COLUMN I applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN ll. Write A only, B only, both A and B, or none next to the question COLUMN | COLUMN II 1.3.1 Contraction of the heart muscles A __ Diastole B__Systole 1.3.2 Transports waste to the kidneys A __ Lymphatic system B__Blood system 1.3.3 Has a secretory function in the cell A — Chromoplast B___Centriole 1.3.4 Role of mitosis A Growth B__ Reproduction Copyright Reserved (4x2) (8) Please Turn Over

Life Sciences Downl oaded fram hlay iso. co Maune 2017 Common Test Grade 10 14 The diagram below shows the human heart. 1.4.1 1.4.2 Copyright Reserved Identify: (a) A (b) (cs) F Give the LETTER and the NAME of the part that: (a) (b) (c) Carries blood from the upper part of the body to the heart Prevents blood from flowing back into the right atrium ls a muscular wall that seperates the ventricles Please Turn Over (1) (1) (1) (2) (2) (2) (9)

Life Sciences Downloaded from hlayiso.com dune 2017 Common Test Grade 10 1.6 The diagrams below represent different phases of mitosis. 1.6.4 1.5.2 1.5.3 1.5.4 1.5.5 Copyright Reserved Identify part A. (1) Rearrange the numbers 1, 2 and 3 to show the correct sequence in which the phases of mitosis occur. (2) Give the LETTER and the NAME of the part that: (a) Pulls chromatids to opposite poles (2) (b) Is produced through replication of genetic material (2) (c) Joins chromatids together (2) How many chromosomes will be present in each cell at the end of the process of mitosis represented in the diagram? (1) What disease is caused by the uncontrolled division of cells by mitosis? (1) (11) TOTAL SECTION A: 50 Please Turn Over

Downloaded from hlayiSO.COMse:2017 Common Test Grade 10 Life Sciences SECTION B QUESTION 2 2.1 Read the extract below. Minerals and vitamins in traditional food In the inland region in Southern Africa, intshungu (traditional plants) are eaten like spinach, Intshungu is natural growing during spring. About 3 million tons of intshungu is wasted, whilst around 6 million of South Africans may use it to prevent diseases. Deforestation and drought is currently affecting the growth of intshungu. This traditional plant is a valuable source of the minerals potassium and iron and vitamins A and C. People should be encouraged to protect this traditional plant from extinction especially in rural areas where it could help to reduce diseases in people. 2.1.1. From the passage above state TWO factors that affect the growth of intshungu. (2) 2.1.2. Why is intshungu recommended for the people suffering from: (a) Poor vision (1) (b) Bleeding gums (1) 2.1.3 Intshungu is natural growing. It does not need application of fertilisers. Describe the effect of fertilisers on the ecosystem when it is washed from farms into nearby ponds. (5) (9) 2.2 Describe THREE properties of enzymes. (6) Copyright Reserved Please Turn Over

Life Sciences Downloaded from hlayiso.co Grade 10 2.3 The diagram below represents plant and animal cells, 2.3.1 Which of the drawings (A or B) represent plant celis? m June 2017 Common Test 2.3.2 Tabulate TWO differences between plant and animal cells that are visible in the diagram. 2.3.3 List TWO similarities between plant and animal cells that are visible in the diagram. 2.3.4 List TWO functions of the part C. 2.3.5 Energy in living ceils is generated in the mitochondria, Make a labelled drawing of a mitochondrion. Copyright Reserved Please Turn Over (4) (14)

Life Sciences 2.4 2.5 ~ Downloaded from hlayiso.com June 2017 Common Test Grade 10 The following steps were followed during an investigation: e The shell was removed from 2 eggs * The two resulting egg cells surrounded by a cell membrane were used in the investigation * Egg cell A was placed in a beaker containing sugar solution * Egg cell B was placed in a beaker containing tap water The diagram below shows the set up of the investigation. A Membrane B | sug ‘ell ——__] an Egg contents a> Sugar solution Tap water 2.4.1 State the process that is being investigated. (1) 24.2 Explain why cell B is expected to be larger after two days. (2) 24.3 Explain why it is necessary to remove the shell from the egg? (2) 2.4.4 State any TWO factors that should be kept constant in this investigation. (2) (7) Describe the structure and function of phloem tissue. (4) [40] Copyright Reserved Please Tum Over

Downloaded from hlayiso.com Life Sciences June 2017 Common Test Grade 10 QUESTION 3 3.1 Study the diagrams below and answer the questions that follow. Copyright Reserved Salivary gland 3.1.1 identify the tissues labeled A, B and D. 3.1.2 State ONE function of each of the tissues labeled B and D in the locations seen in the diagrams above. 3.13 State TWO ways in which tissue A is adapted for its function. 3.1.4 Tissue € makes up the skin in our body. Explain why it should consist of actively diving cells. (3) (2) (2) (2) (9) Please Turn Over

Life Sclences 3.2 Grade 10 ~ Downloaded from hlayiso.com..,, June 2017 Common Test An investigation was carried out to determine the shortage of blood type ‘O’ that faces South Africa in three different blood banks (A, B, G). Blood from a person with blood type ‘O’ can be used safely in transfusions into patients of any other blood type. The table below shows the blood units available and the blood units required by each blood bank. BLOOD BANK UNITS OF TOTAL BLOOD in 2016 (litres) Units of blood Units of blood available required A 20 35 B 122 550 c 181 510 3.2.1 Draw a bar graph to represent the units of blood available in each of the the three different blood banks. 3.2.2 State ONE reason why blood type ‘O’ is most important. 3.2.3 How many blood units are needed in Blood Bank C to reach the maximum units required? Show ALL working. Copyright Reserved Please Turn Over (6) (1) (2) (9)

Downloaded from hlayiso.com Grade 10 Life Sciences June 2017 Common Test 3.3. The diagram below represents a synovial joint. 3.3.1 Identify this type of synovial joint. (1) 3.3.2 Identify: (a) Tissue A (1) (b) Bonec (1) 3.3.3 What type of movement does this joint allow? (1) 3.3.4 Explain ONE function of the fluid found between the bones of this joint. (2) 3.3.5 Explain what will happen to a person if part B is damaged. (3) 3.3.6 Tendons which join muscle to bone consist of white fibrous tissue. Explain the consequence if tendons were made of yellow elastic tissue instead. (2) 3.3.7 Various types of diseases are associated with the skeletal system. Identify the disease characterized by each of the following: (a) Bowing of the legs (b) | Weak and brittle bones | (c) Inflammation and pain at the joints (3) | (14) Copyright Reserved Please Turn Over

Lite Sclences 3.4. The diagram below the skeletal system of a frog. Downloaded from hlayiso.com Grade 10 June 2017 Common Test 3.4.1 Identify bones: (a) A (b) B (c) G (1) (1) (4) 3.4.2 Write down the LETTER only of the part that represents the: 3.4.3 (a) — Radius/ulna (b) — Tibia/fibula (c) Vertebra (1) (1) In comparison to body size, the bones in part D are longer than the same bones in a human. Provide a possible explanation for this. Copyright Reserved (2) (8) [40] TOTAL SECTIONB: — 80 Please Turn Over

Downloaded from hlayiso.com Life Sciences June 2017 Common Test Grade 10 SECTION C QUESTION 4 Water moves from the soil into the root hair and then to the xylem of the root from where it moves upwards to the leaves where it is used in the palisade cells of the leaf in photosynthesis. Explain the ways in which the root hair, the xylem and the palisade cells are adapted for the above functions. Content: (17) Synthesis: (3) (20) NOTE: NO marks will be awarded for answers in the form of flowcharts, tables or diagrams. TOTAL SECTION C: 20 GRAND TOTAL: 150 Copyright Reserved

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Downloaded from hlayiso.com Life Sciences — Grade 10 3 Marking Guideline SECTION B QUESTION 2 21 2.1.1 - Deforestation’ - Drought” MARK FIRST TWO ONLY 2.1.2 (a) Has vitamin AY for good vision (b) Has vitamin CY for healthy gums. 2.1.3 ~ Results in eutrophication’ - leading to algal bloom/excessive growth of algaev” dune 2017 Common Test - Sunlight may not reach plants growing in deeper waterY - Prevents photosynthesis” of other water plants - Plants may diev’ - Decomposition/bacterial activity increases¥ - Reduce oxygen in water” - causing animals to die¥ 2.2 - Substrate specific” ‘ISpecific enzyme acts on a specific substrate - Its shape allows it to act or fit in a specific substrate - Enzymes are sensitive to temperature changesY ~ At lower temperatures, enzyme is inactiveY - At higher temperatures, enzyme becomes denatured” - Enzymes are sensitive to pH changes¥” - Enzymes denature when exposed outside its pH rangeY = Work within their optimum pHY 23 2.3.4 AY 23.2 Any (2) Any (2) Plant cell Animal cell Cell wail is outermost¥” Cell membrane is outermostY” Regular shapev Irregular shapew” Large vacuole~ Vacuole smali/absentY” @ (1) a) Any (5) (9) 3x2 (8° (1) 1 for table + any 2x2 (5) MARK FIRST TWO ONLY Copyright Reserved Please turn over Life Sciences — Grade 10 4 June 2017 Common Test Marking Guideline 2.3.3 - Have nuclei” - Have cell membranes¥” -Have cytoplasm” Any (2) MARK FIRST TWO ONLY 2.3.4 - Controls all activities of the cell” - Controls hereditary characteristics” (2) MARK FIRST TWO ONLY 235 Caption” Any 3 correct labels (outer membrane, inner membrane, cristae, matrix, ribosome) ¥“¥Y (4) (14) 2.4 2.4.1, OsmosisY (1) 2.42 -Water molecules move from tap waier into the egg cell” - as a result of a concentration gradient“/since tap water has a higher concentration of water (2) 2.4.3. -To exposé cell membrane”/ remove the impermeable shell - so that water can pass throughY (2) 2.4.4 - Size of beaker” - Amount of sugar solution and tap water” - Size of egg¥ ~ Eggs from same animal” - Same method to remove shell” Any (2) MARK FIRST TWO ONLY ™ 2.5 - Phloem consisis of sieve tubes” - with sieve platesY” - and companion celis~” - They transport food from the leaf¥ (4) [40] Copyright Reserved Please turn over

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Downloaded from hlayiso.com Life Sciences - Grade 10 7 dune 2017 Common Test Marking Guideline SECTION C QUESTION 4 Structural suitability of root hair Elongated” to expose a large surface area for absorption” Thiny to grow between fine particles and maintain contact with waterv” Large vacuole” with low water concentration allowing osmosis¥ Thin cell wall,”7no cuticle to allow membrane to be in contact with water¥ Thin cytoplasm” to allow easier movement of water into the vacuole” Any (3x2) (6) Structural suitability of xylem No cross walls¥ . to allow unimpeded flow of water~/easy water movement Has bordered pits~/unthickened portions for lateral transport” Ligninv for support~/prevent collapse/ withstand pressure No living contents“/hollow for unimpeded water movement”/easy water movement Long tubes~/cells joined end to end to iransport water to greater heights” Any (4x2) (8) Palisade Cells Long cells“ allowing deeper penetration of light” Large number of chloroplastsY To trap optimum light” Thin walled celis~ For easy diffusion of water/carbon dioxide” Located just below epidermis” for easy access to light” Arranged perpendicular to leaf surface” so that more cells can be exposed to light” Any (3) Content (17) Synthesis (3) [20} ASSESSING THE PRESENTATION OF THE ESSAY Answered all aspects req to the topic. cause-effect sequence. by the essay in sufficient detail. All information is relevant to Structure appropriately ‘Obtained at least the following adaptations of the: linked to'unction in on adaptations for each of the ~ Root hair adaptations of the: following: - Xylem - Root hair - Root hair (4/6) - Palisade cells - Xylem = Xylem (4/8) There is no irrelevant information _|- Palisade cells = _ Palisade cells (2/3) 1 mark ~_| 4 mark 4d mark TOTAL SECTION C: 20 GRAND TOTAL: 150 Copyright Reserved | ' i ! |