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Form 1 Biology End Term 2 Exams 2021

Class: Form 1

Subject: Biology

Level: High School

Exam Category: Form 1 End Term 2 Exams

Document Type: Pdf

    

Views: 1213     Downloads: 45

Exam Summary


BIOLOGY FORM 1
END OF TERM 2 EXAMINATIONS 2021

INSTRUCTIONS
Answer all the questions in the spaces provided.

1. What is biology? (1 mark)


2. Give two skills gained by a student learning Biology. (2 marks)


3a)Name the unit of classification that has the least organisms. (1 mark)


b) State the application of Binomial nomenclature in naming organisms. (1 mark)


4. What is the importance of using a hand lens in classification of organisms (1 mark)


5. State two main branches of biology. (2 marks)


6. Define each of the following terminologies as used in biology : (2 marks)
a). Ecology


b). Anatomy


7. What characteristics of living organisms is represented by the following characteristics:
a) A cat producing kittens. (1mk)


b) A girl dropping a hot pan. (1mk)


c) The exhalation of carbon (IV) oxide. (1mk)


8. The diagram below represents a plant cell.
Capture1.JPG
(a) Name a carbohydrate which forms part of the structure labelled S. (1mark)


(b) State two functions of the part labelled R. (2 marks)


(c) Name two structures present in the diagram but absent in the animal cell (2marks)


9 a) An electron microscope has a much greater resolving power than a light microscope. Explain the meaning of the term resolving power. (1 mark)


b) Give a reason why an electron microscope cannot be used to study live specimen. (1 mark)


10. What is taxonomy? (1mark)


11. Give two reasons why classification is important in biology. (2marks)


12. (a) Distinguish between growth and development. (2marks)


(b) State the importance of growth in living organisms. (1mark)


13. During a practical lesson to estimate the size of a cell, using the sketch below which some students observed, calculate the length of one cell in micrometers given that the field of view was 8mm wide. (3 marks)
Capture2.JPG

14. a) What is meant by the term Entomology. (1 mark)


b) The diagram below represents a certain apparatus used by biology students.
Capture3.JPG
(i) Name the apparatus above. (1 mark)


(ii) State the role of the apparatus named in b) (i) above. (1 mark)


15. Black jack (Bidenspilosa) belongs to the family Compositae.
What is it’s:
Genus. (1 mk)


Species. (1 mk)


16. a) Differentiate between prokaryotic and eukaryotic cells. (1 mk)


b) i) identify the organelle represented by the diagram below. (1 mk)
Capture4.JPG
ii) State the function of the organelle identified in 2b(i) above. (1 Mark)


17. If a light microscope had an eye piece lens of X25 and an objective lens of X40, what would the total magnification be? (2 mks)


18. a. State the importance of each of the following process in living things. (3 mks)
i. Respiration


ii. Gaseous exchange


iii. Reproduction


b. Apart from the characteristics of living things mentioned in (a) above, state any other 4other characteristics common in living things. (4mks)


19. Give a reason why each of the following steps are followed when preparing cross sections of a leaf for examination under a microscope: (4mks)
a) Cutting very thin sections


b) Using sharp razor blade (scalpel) during cutting.


d) Placing the sections in water


e) Staining the sections with iodine before observing under a microscope.

20. Calculate the magnification of the drawing of the termite below given that the actual length of the termite is 0.9cm long .Show your working (2mks)
Capture5.JPG

21. Plasmodium Falciparum are transmitted by a mosquito.
(a)Identify two mistake made in writing the scientific name (2mks)


(b) Can the above organisms interbreed? Give reasons (2mks)



(c) Rewrite the above scientific name properly (1mk)


22. Peter was using a light microscope to view onion cells with lens combination of eye piece lens X10 and objective lens X20.
a) Calculate the total magnification. (1 mk)


b) If he changed the objective lens magnification to X40, would the cells appear bigger or smaller? Explain. (2 mks)


23. Below is a structure found in plants.
Capture6.JPG
Name the organelle. (1 mk)


What is the role of the organelle you have named in (a) above. (1 mk)


Name the parts labeled J and L. (3 mks)


24. Name the five major kingdom of classification (5mks)


25. The diagram below represents the structure of a light microscope. Study it and answer the questions that follow.
Capture7.JPG
a) Name the parts of the microscope labeled A to G. (7 mks)


B) State the functions of each of the parts marked E and F. (2 mks)


c) Which part of the microscope (use letter symbols):
i. Contributes to the magnification of the specimen. (1 mk)


ii. Is used to move the body tube over very small distances when observing under high power magnification. (1 mk)


e) While trying to observe a specimen under a microscope, a student failed to see the field of view. Suggest two possible causes of this. (2 mks)


26. The diagram below shows a cell as seen under a microscope.
Capture8.JPG
a)i. Is this observation under a light or an electron microscope? (1 mk)


ii. Give a reason for your answer. (1 mk)


i. Is this an animal or a plant cell? (1 mk)


ii. Give a reason for your answer in (b) (i) (1 mk)


b) Name the parts labeled A to H. (5 mks)


c)State the functions of each of the parts marked A, B, C, D, E, F, H. (6 mks)


27. Briefly and adequately explain how plants compensate for lack of movement in a constantly changing environment. (2 marks)


 

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