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S.3 Biology Paper1

BIOLOGY


SECTION A:  (20 Marks)

1. Which of the following substances is not contained in the gromerulear filtrate in the 
mammalian kidney?
A.   Urea.     B.   Plasma proteins. 
C.   Glucose.     D.   Mineral salts.

2. Which one of the following relationship is an example of mutualism? 
A.   Tapeworm living in a human gut. B.   Bacteria living in the gut of a cow.
C.   Tick living on the skin of a pig. D.   Plasmodium living in human blood. 

3. Which of the following are not respiratory surfaces in animals?
A.   Spiracles. B.   Trachioles. C.   Gill filaments. D.   Alveoli. 

4. Strips W, X, Y and Z of the same size arid shape were cut from a raw pawpaw, shoes sap
had a sugar concentrator of 28%.  The strip where then placed in sugar solution of
different concentrations as shown in table I. 
 

Which strip would be longest after 4 hours?
 A.   X   B.   W   C.   Y   D.   Z

5. Which one of the following is the mode feeding of a mould? 
A.   Holozoic. B.   Saprophytic. C.   Autotrophic. D.   Parasitic. 

6. Which one of the following plant organs has a scattered arrangement of vascular bundles? 
A.   Root of monocotyledonous plant. B.   Stem of a monocotyledonous plant.
C.   Stem of a dicotyledonous plant. D.   Root of a dicotyledonous plant. 

7. Which one of the following enzymes act best in low PH?
A.   Pepsin.  B.   Peptidase. C.   Trypsin.  D.   Lipase. 

8. The part of the microscope used to make the image clear is the;
A.   objective lens.    B.   eye piece. 
C.   course adjustment.   D.   fine adjustment. 

9. The bacteria which converts ammonia into nitrates are called;
A.   putrefying bacteria.   B.   nitrifying bacteria. 
C.   denitrifying bacteria.   D.   nitrogen fixing bacteria.

10. Which one of the following foods is rich in iron? 
A.   Milk.  B.   Cheese.  C.   Liver.  D.   Butter.

11. Which one of the following conditions would lead to the highest transpiration? 
A.   High light intensity and low temperatures.
B.   Low light intensity and high temperatures.
C.   Low humidity and high temperatures.
D.   High humidity and low temperatures. 

12. Which one of the following insects undergoes incomplete metamorphosis?
A.   Housefly and mosquito.  B.   Butterfly and cockroach. 
C.   Honey bee and moth.   D.   Cockroach and grasshopper.

13. Which one of the following occur in a flower after fertilisation? 
A.   Petals, stigma and style persist. 
B.   Ovary develops into seed coat.
C.   Ovary, petals and sepals dry and fall off.
D.   Ovules develop into seeds. 

14. Which one of the following is not a reproductive and storage organ of a plant?
A.   Yam rubber.    B.   Ginger rhizome. 
C.   Cassava tuber.    D.   Irish potato tuber.

15. Which of the following are not social insects? 
A.   Ants.  B.   Bees.  C.   Termites.  D.   Butterflies.

16. Which one of the following blood vessels has the highest level of nutrients? 
A.   Mesentric artery.   B.   Hepatic portal vein.
C.   Renal artery.    D.   Hepatic vein. 

17. Which one of the following organisms has the largest surface area to volume ratio?
A.   Dog.  B.   Frog.  C.   Cockroach. D.   Ameoba. 

18. Which one of the following is not an adaptation of a leaf for absorption of carbon dioxide?
A.   Its exposure in the air.  B.   Presence of air spaces in the mesophyll layer. 
C.   Its being thin.   D.   Presence of chloroplasts. 

19. When test a leaf for starch, it is boiled in alcohol in order to; 
A.   kill the protoplasm.   B.   make it permeable to iodine.
C.   remove the chlorophyll.  D.   make it soft. 

20. Which of the following organisms can reproduce both sexually and asexually? 
A.   Amoeba.  B.   Spirogyra. C.   Bacteria.  D.   Yeast.
 
SECTION B:  (19 Marks)
21. (a)    State four ways in which a leaf is adapted for photosynthesis.  (4 marks) 
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(b) State two ways in which food transported to growing region is utilized by the plant. (2)
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(c) State two conditions that are needed for photosynthesis to occur?  (2 marks)
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22. (a)   The figure below shows a cross section part of a plant. 

Name the parts labeled 1 to 5.
1  _________________________________ 
2  _________________________________
3  _________________________________
4  _________________________________
5  __________________________________

(b) Giving a reason, state the part of the plant from which the section was taken. (2 marks)
___________________________________________________________________
___________________________________________________________________  
___________________________________________________________________
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(c) i)    State the functions of parts labeled 3 and 4.    (2 marks)
3     ____________________________________________________________
       ____________________________________________________________
4     ____________________________________________________________
       ____________________________________________________________ 

ii)   Give two similarities between the cells in part labeled 3 and those found at the 
 tips a growing shoots.       (2 marks)
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SECTION C:  (30 Marks)


23. (a)   Name the components of the mammalian blood.    (4 marks) 
(b) Give three structural differences between an artery and a vein.  (3 marks)
(c) Give the functions of blood circulation.      (8 marks)
 
24. (a)    Define diffusion.         (1 mark)
(b) State the factors that affect the rate of diffusion.    (4 marks)
(c) Explain an experiment that osmosis occurs in a living tissue.   (10 marks)

 
END. 

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