Student’s Assessment Number ………………… THE UNITED REPUBLIC OF TANZANIA NATIONAL EXAMINATIONS COUNCIL OF TANZANIA FORM TWO NATIONAL ASSESSMENT 033 BIOLOGY Time: 2:30 Hours Yeaar: 2020 Instructions 1. This paper consists of sections A, B and C with a total of eleven (11) questions. 2. Answer all questions in sections A and B and one (1) question from section C. 3. Section A carries thirty (30) marks, section B fifty (50) marks and section C carries twenty (20) marks. 4. All writing must be in blue or black ink except drawing must be in pencil. 5. Cellular phones and any unauthorised materials are not allowed in the assessment room. 6. Write your Assessment Number at the top right corner of every page. FOR ASSESSOR’S USE ONLY QUESTION NUMBER SCORE ASSESSOR’S INITIALS 1 2 3 4 5 6 7 8 9 10 TOTAL CHECKER’S INITIALS

Student’s Assessment Number ………………… A Turgidity B Crenation C Plasmolysis D Haemolysis A Stem B Root tuber C Tap root D Rhizome A accident. B emergency. C outbreak. D disaster. SECTION A (30 Marks) Answer all questions in this section. 1. For each of the items (i) - (x), choose the correct answer from among the given alternatives and write its letter in the box provided. (i) Which condition occurs when a plant cell is immersed in highly concentrated solution? (ii) The process by which green plants and other organisms use sunlight energy to manufacture their own food is known as A respiration B digestion C photosynthesis D nutrition (iii) Which storage organ does sugarcane stores its food after photosynthesis? (iv) The following are the end products of anaerobic respiration in plants except (v) (vi) Bacteria and fungi are ecologically referred to as A producers. B decomposers. C parasites. D predators. (vii) Unexpected event which can cause injury and sometimes death is called (viii) The liquid induced into the body of an organism so as to increase antibody production is known as (ix) People with talking behaviour while eating are considered to have (x) A tissue fluid. B lymph. C vaccine. D plasma. A energy. B lactic acid. C carbon dioxide. D alcohol. Which organisms belongs to Kingdom Plantae? A Fern and amoeba B Moss and mucor C Liverwort and yeast D Fern and moss A bad manner. B table manner. C talkative manner. D chatty manner. Arteries have thick muscular walls because they transport blood A at low pressure. B at high pressure. C towards the heart. D away from the heart.

Student’s Assessment Number ………………… 2. For each of the items (i) - (x), write True if a statement is correct or False if a statement is not correct in the spaces provided. (i) All cells contain chloroplasts. ……………………………. (ii) Cholera is transmitted through contaminated food. ……………………………. (iii) During inhalation, diaphragm relaxes and becomes dome-shaped. ……………………………. (iv) Vena cava transports deoxygenated blood from the body to the heart. ………………………… (v) Sharing of towels can spread STI’s ……………………………. (vi) Zoologist is a person who studies plants. ……………………………. (vii) Bile is a greenish yellow liquid produced by gall bladder. ……………………………. (viii) Producers are organisms that make their own food. ……………………………. (ix) All members of Kingdom Fungi are autotrophs. ……………………………. (x) Sitting upright when eating or drinking prevents choking. ……………………………. 3. Match the phrases in List A with responses in List B by writing the letter of the correct response below the corresponding item number in the table provided. List A List B (i) Ability of the body to resist infection and disease A Disease (ii) The invasion of pathogens into the body of living organism. B Vaccination (iii) A process of inducing antigens into a healthy person. C Infections (iv) A condition that affects the health of the body and is characterized by certain symptom. D E Vectors Immunity (v) Agents which spread pathogens in the community. F Endemic G Antibodies H Pandemic Answers List A (i) (ii) (iii) (iv) (v) List B 4. Complete each of the following statements by writing the correct answer in the spaces provided. (i) The sticky fluid in the nose that helps to trap dust is known as (ii) The muscles that are found between the ribs are called (iii) The process of taking in air into the lungs is called (iv) The breakdown of food in the absence of oxygen to release energy is known as (v) The structure that closes the opening of the trachea to prevent food from entering it during swallowing is known as

Student’s Assessment Number ………………… SECTION B (50 Marks) Answer all questions in this section. 5. (a) Differentiate eukaryotic from prokaryotic cells. (b) Choose any two parts found in an animal cell and briefly explain one function for each. (i) (ii) (c) Why most of the plant cells have cellulose cell wall? Briefly explain. 6. (a) State three laboratory rules. (i) (ii) (iii)

Student’s Assessment Number ………………… (b) Figure 1 represents an instrument used to magnify too small objects or organisms in a Biology laboratory. Study it carefully and then answer the questions that follow: Figure 1 (i) Name the parts labeled A - F A B C D E F (ii) State the function of the part labeled E. 7. (a) Why is food chain considered to be a simple transfer of energy? Briefly explain. (b) Construct four possible food chains by using the following organisms: Grasses, Lion, Bacteria, Zebra, Hyena and Giraffe. (i) (ii) (iii) (iv)

Student’s Assessment Number ………………… (c) Explain the role played by the following organisms in the food chains you have constructed in 7(b) above. (i) Bacteria. (ii) Grasses. 8. 2 cm 3 of a food sample solution Q changed to purple colouration when 1 cm 3 of sodium hydroxide followed by 2-3 drops of copper II sulphate solution were added to it. (a) Identify a food substance present in the solution Q. (b) State two functions of the food substance present in the solution Q. (i) (ii) (c) Give five natural sources of food substance contained in the solution Q. (i) (ii) (iii) (iv) (v) 9. (a) State the use of the following components of First Aid kit. (i) Cotton wool (ii) New razor blade (iii) Soap (iv) Iodine tincture

Student’s Assessment Number ………………… (b) Give four importance of providing First Aid to a person who has been bitten by a snake. (i) (ii) (iii) (iv) SECTION C (20 Marks) Answer one (1) question from this section. 10. Describe two merits and two demerits of each of the artificial and the natural systems of classifications. 11. Explain the importance of transport of materials in animals. Give six points.