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231/1 Biology Question Paper
231/1 Biology
Course:Biology
Institution: Form 4 Mock question papers
Exam Year:2010
Name………………………………………………… Index No. …………………….
School ………………………………………………... Date……. …………………….
Sign……. …………………….
231/1
BIOLOGY
PAPER 1
JULY / AUGUST 2010
Time: 2 Hours
BUTERE DISTRICT JOINT EVALUATION TEST - 2010
Kenya Certificate of Secondary Education (K.C.S.E)
BIOLOGY
PAPER 1
JULY / AUGUST 2010
Time: 2 Hours
INSTRUCTIONS TO CANDIDATES
• Answer ALL the question.
FOR EXAMINERS USE ONLY
QUESTION
Max Score Candidate Score
1 – 32
80
This paper consists of 8 printed pages. Candidates should check the paper carefully to ensure that all the pages are printed as indicated and that no question(s) are missing.
1 . The scientific name for French bean is Pharseolus Vulgaris
(a) What taxon does the term phaseolus represent? (1mk)
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(b) State two rules that are followed when giving a scientific name to an organism. (2 mks)
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2. What is the function of the mirror in the microscope? (1 mk)
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3. A seedling shoot was exposed to unidirectional light as shown below .The set up was left in the dark room for three days.
(i) Make a drawing of the expected results at the end of the experiment. (2mks)
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(ii) Explain the expected results at the end of the experiment. (2mks)
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4. The diagram below represents a specialized cell of a certain tissue.
(i) Identify the cell (1mk)
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(ii) Name two structures in the human body where the cells are found (2mks)
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5 . State two characteristics of a meristematic cell. (2mks)
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6. State three functions of water in a germinating seed. (3mks)
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7. Name the hormone that controls the osmotic pressure of the body fluids. (lmk)
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8. The diagram below represents an eye defect.
(i) Name the eye defect represented. (l mk)
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(ii) How can the defect be corrected. (l mk)
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9. Give the function of melanin pigment produced in the skin of man. (l mk)
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10. What is the importance of saprophytic bacteria in an ecosystem? (l mk)
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11. A student while carrying out an experiment observed 8 cells across the field of view of a light microscope. If the diameter of the field of view is 5 mm, calculate the average length of each cell in micrometers. (2mks)
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12. State one feature present in flowers that can be used to distinguish between a monocotyledonous flower and a Dicotyledonous flower. (lmk)
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13. State the function of the following structures in the human male reproductive system.
(i) Prostate glands. (l mk)
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(ii) Seminiferous tubules. (l mk)
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(iii) Glans penis (l mk) ...........................................................................................................................................................
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14. State three limitations of using fossil records as evidence for organic evolution. (3mks)
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15. State three characteristics of skeletal muscles. (3mks)
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16. A student observed that there were fewer lions than antelopes in Lake Nakuru national park. Explain this ecological observation. (3mks)
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17. Colour blindness is a sex linked characteristic in man .A couple who had normal colour vision got a colour blind son.
(i) What is sex linkage? (lmk)
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(ii) Name two other sex linked traits in humans (2mks)
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18. The diagram below shows a stage in cell division
(i) Name the stage of cell division that exhibits the process above. (lmk)
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(ii) What is the significance of the phenomenon shown to a species? (lmk)
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19 . Differentiate between respiration and respiratory surface. (2mks)
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20 State three adaptations of the skin of the frog to gaseous exchange. (3mks)
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21. Give the advantages of binocular vision over monocular vision (3mks)
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22 . A student collected an organism in the school compound and noted that it had a segmented body and two pairs of legs per body segment.
(i) Name the class to which the organism belongs. (lmk)
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(ii) State two other features the student may have observed. (2mks)
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23. Describe the changes that occur to the rib cage and the diaphragm during expiration. (4mks)
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24. State the functions of the following parts of the human brain
(i) Medulla oblongata (lmk)
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(ii) Pituitary gland (lmk)
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(iii) Cerebellum (lmk)
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25. A student made equidistant marks on a radical of a dicotyledonous seedling. After three days the distance between the marks was measured.
a) What was the aim of thee experiment (lmk)
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b) Predict the results that were likely to be obtained by the student (2mks)
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26. Explain how sunken stomata lower the rate of transpiration (2mks)
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27. Plants of a particular species growing in certain habitat flower at the same time .What is the importance of this adaptation (lmk)
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28. State three roles played by the bark in plants (3mks)
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29. State three adaptations of the thoracic vertebrae to its function (3mks)
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30. In an ecological study, form four students wanted to estimate the population of fish in a school fish pond.
a) Apart from a fish net and gloves name two other requirements they would need in their study (2mks)
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b) State the most appropriate method they would use to estimate the fish population. (lmk)
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31. Industrial wastes may contain metallic pollutants. Explain how the pollutants may indirectly reach and accumulate in the human body when the wastes are dumped into rivers. (3mks)
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32. Differentiate between tropisms and tactic responses. (3mks) ..........................................................................................................................................................
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