Angel International School - Manipay 1 st Term Examination November, 2015
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1 Grade 08 Angel International School - Manipay 1 st Term Examination November, 2015 Biology Duration: 2 Hours Part 1 Choose the correct answer and underline it. 1) An infection disease is caused by. a) Bacteria b) Fungi and protozoan 2) Incorrect statement about microbes: a) Individuals cannot observe by naked eye b) Can survive in various environmental conditions c) Bacteria and viruses d) Microorganisms c) All algae are micro organisms d) Mushroom is type of fungi Index No:- 3) A fungus that entered a bacterial culture accidentally secreted a chemical substance that destroyed the bacteria. The scientist who discovered these fungus is a) Alexander Fleming c) Robert Hook b) Scwann d) Schliden 4) A disease that does not spread by means of air a) Common cold b) Leprosy c) Meningitis d) HIV 5) Vinegar production is, a) A result of fungal activity b) A result of both fungal and viral activities c) Only a result of bacterial activity d) Result of yeast 6) Which is correct bacteria activity in vinegar making process? a) fermentation c) Ethanol changes in to acetic acid. b) concentration of acid d) producers of alcohol and carbon dioxide 7) Incorrect statement about antibiotics a) Some antibiotics are produced by microorganisms b) Antibiotics are used to cure diseases caused by bacteria, virus and fungi c) Soil bacteria and fungi are used to produce most antibiotics d) When using antibiotics, side effects such as allergies can occur 8) Penicillin is secreted by, a) Bacteria b) Fungi c) Virus d) Fungi 9) In a compound microbe magnification of eye piece is x10 and object piece x25, what is the total magnification? a) 200 b) 250 c) 300 d) ) What are the most effective methods for the house hold compost production? a) Pit method, land method b) Basket method, burning c) Land and basket method d) Pit method, burning 11) Causative agent of conmen cold is a a) Bacteria b) Virus c) Fungi d) Amoeba 1
2 12) Microbes are called, microbes because.? a) they are killed by micro-waves b) you can hear them when they are near a micro-phone c) they are so small, they can only be seen using a micro-scope d) they have micro-chips that help them remember information 13) Where do bacteria live in your body? a) In your mouth b) Up your nose c) On your skin d) All of the above 14) How long have micro-organisms been alive? a) fifty years b) hundreds of years 15) What shape are bacteria? 16) Who first produced the vaccine? a) Chalmette and Guerin b) Louis and Guerin 17) Transect is made by... a) stretching a length of rope along the line b) a square frame 18) When the size of the human population began to rise slightly? a) when discovered how to raise crops b) when discovered how to raise farm animals c) when human started to get together d) all of the above c) thousands of years d) millions of years a) Rod b) Sphere c) Spiral d) all of the above c) Jenner and plasterer d) Chalmette and Jenner c) measuring the foot path d) glass apparatus and nets 19) Which of the following statement is false? 1. wood lands are being destroyed to make space for roads,houses and factories 2. hedgerows have been removed to make larger fields 3. fresh water habitats have been polluted with industrial wastes 4. tropical rain forests are being destroyed to make town and roads a) 1 and 2 b) 1 and 3 c) 1,2 and 3 d) all of the above 20) Name the below organisms. a) ciliate b) amoeba c) filagilate d) none of the above 21) Which one of the following is not fresh water invertebrate? a) nymph b) shrimp c) pleurococcus d) maggot 22) Which plant has fronds? a) ferns b) liverworts c) conifers d) mosses 2
3 23) which type of the tissue in the surface of the skin? a) Epidermis b) Circular 24) Which muscle supports the hair follicle? a) erector muscle b) circular muscle 25) What are the productions of decomposers? a) minerals, carbon dioxide, water b) oxygen,alcohol, carbon dioxide c) Ciliated epithelial d) Lumen c) longitudinal muscle d) biceps muscle c) minerals,waste,water d) pollution,carbon dioxide,vinegar 26) What are productions of above organisms, when they are respire unaerobically? a) Alcohol and carbon dioxide b) Oxygen and carbon dioxide c) Alcohol and sugar d) Glucose and carbon dioxide 27).. obtain energy from hydrogen sulphide for their life process. a) Bacteria b) Virus c) Ager d) Monera 28) How marine habitats got risk to survive? a) By oil pollution from shipwrecked tankers b) By water pollution from agriculture c) By sewage and industrial wastes d) All of the above 29) Plant distribution can be examined using. a) A transect b) An quadrat c) An quadrat and transect d) all of the above 30) Which substance breaks down the enamel of the teeth and create cavity? a) Plaque b) Abscess c) Acids d) Sugary substances (30 marks) Part -2 1) Match the letter in the diagram (right) with the best statement: (5 marks) 3
4 2) Fill in the blow table by giving one example of vaccine to each given antigen group. Types of antigen group Example of vaccine a) Live causative agents where growth is inactivated. b) Toxicity of the causative agent is inactivated chemically c) Parts of causative agent cells or virus d) Destroyed or inactivated causative agents. 3) Consider the following statements. Decide whether each one is true or false. 1. Bacteria help you digest your food (..) 2. A bacterium is smaller than a virus. (..) 3. Viruses are parasites. (..) 4. A parasite can live anywhere. (..) 5. Your body has two main defenses against disease (..) 6. You can eat some types of fungi. (..) 7. Viruses can infect other micro-organisms like bacteria. (..) 8. Bacteria cannot live in very hot or very cold temperatures. (..) 9. Viruses can infect other micro-organisms like bacteria. (..) 10. All shapes of bacteria can be seen only under a microscope. (..) 4) Answer the following. (4 marks) (10 marks) a) What are the microbial conversions occur during the vinegar production? b) Name the natural compound that can be used to produce natural vinegar... (1) c) When you are producing vinegar, what is the intermediate product formed before the end product?. (1) d) What is the type of microorganism used in the first step of vinegar production?.. (1) e) Write the chemical transformation of second step of vinegar production? (5 marks) 4
5 5) a) Which method is used to get the large population of bacteria in lab? Explain it (3) b) How bacteria are introduced to the agar?.. (1) c) How to pre sterilized the petridishes?.. (1) (5 marks) 6) a) How antigens differ from antibodies? b) There are four types of antigens used in immunization vaccine. Name two types of antigen out of the four.. (1) c) Which is the natural immune system in the body? d) How natural immune systems destroy harmful microorganisms? (2) e) What is an antibiotic? f) Give three examples for antibiotics. g) What is the purpose of giving a vaccine to a person? h) Which is the first anti septic?. (1) i) Write two factors that effect to the growth of microorganisms. (10 marks) 5
6 7) a) What is ecology?. (1) b) Give two example of echo system?.. (1) c) What is bio mass? (1) d) Draw a single diagram on eco system. (4) 8) e) Write down a food chain (i) which ends with human (ii) in the sea and (iii) with five lings in it... (2) f) What is population?. (1) g) How population predict change?. (2) h) What are important things in predicting changes in population? (2) i) What is the decomposer?. (1) a) What are the methods can use to collect small animals from land habitats?. (3) b) What are the methods can use to collect small animals from aquatic habitat?.. (2) c) Briefly explain the small animals collecting method by i) Tulguran funnel and ii) Pooter? (11) ***** (15 marks) (16 marks) 6
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