Biology Paper 1 Question Paper
KCSE CLUSTER TESTS 23
Biology Paper 1
Define the following terms:
a) Cytology
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b) Microbiology
2 marks
Other than anchorage, state two other functions of rhizoids of mosses. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ……………………………………………………………………………………………….
2 marks
a) Why is it necessary to use a sharp razor blade while preparing sections to be viewed under a light microscope? ……………………………………………………………………………………………….
b) Give the functions of the following organelles.
i) Centrioles
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ii) Nucleolus
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4 marks
Define osmosis
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1 marks
State the role diaphragm;
a) In the light microscope
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b) During ventilation in man
2 marks
Describe what happens during the dark stage of photosynthesis.
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2 marks
State one function of the following structures in mammals:
a) Caecum
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b) Spleen
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2 marks
The following diagram represents a plant division spermatophyta.
a) Name the sub-division to which the above plant belongs.
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b) Give two observable characteristics of this sub – division.
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3 marks
a) State two differences between marginal and axile placentation.
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b) What is the role of follicle stimulating hormone (FSH) in female menstrual cycle.
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3 marks
State any two factors in a seed that cause dormancy.
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2 marks
. Name the products of anaerobic respiration in
a) Plants:
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b) Animals:
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2 marks
Explain how stigma in wind pollinated flower is adapted to its function
2 marks
The diagram below represents a transverse section of a plant organ
a) Name the plant organ from which the section was obtained.
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b) i) Name the class to which the plant organ was obtained.
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ii) Give a reason for your answer in (b) (i) above.
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c) Name the part labelled N
4 marks
Name two components of blood that are not present in glomerular filtrate
2 marks
Give three factors that determines the amount of energy a human being requires in a day.
3 marks
Oil can be app lied on the stagnant water two control the spread of malaria.
How can this practice control the spread of malaria? ……………………………………………………………………………………………….
1 marks
During a strenuous exercise the chemicals process represented by the equation below takes place in the human muscle cells.
a) Name the process represented above. ……………………………………………………………………………………………….
b) Name substance X
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3 marks
. a) State the function of piliferous layer in roots.
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b) Explain why cell walls of root hairs are thin.
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c) State one way in which food moves in the phloem naturally.
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3 marks
The diagram below represents a human foetus in a uterus
a) Name the part labelled S.
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b) Name two features that enable the structure labelled P carry out its function. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ……………………………………………………………………………………………….
c) State the role of the part labelled R.
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4 marks
State three ways in which a respiratory surface is adapted to its function
3 marks
Examine the diagram below and answer the questions that follow.
a) Name the structures labelled A and B and the cell labelled H.
A………………………………………………………………………………………………. B……………………………………………………………………………………………….
Cell H………………………………………………………………………………………….
b) How is the cell labelled X adapted to its function.
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5 marks
a) It is necessary for large animals to have elaborate transport system. Explain ………………………………………………………………………………………………. ………………………………………………………………………………………………. ……………………………………………………………………………………………….
b) Explain why amoeba does not require transport system.
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3 marks
State three mechanisms that ensure cross pollination takes place in flowering plants
3 marks
What is apical dominance?
2 marks
When are the following hormones secreted:
a) Insulin
b)Antiduretic hormone.
2 marks
A form three class set-up an experiment below. Make a careful observation and answer questions that follow
If the set up was kept at a room temperature for a week. a) What was the aim of the experiment? ………………………………………………………………………………………………. ……………………………………………………………………………………………….
b) Account for the results at the end of experiment.
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3 marks
State the role of saprophytes in an ecosystem
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2 marks
. An experiment was set up as shown below.
The set up was left for 30 minutes. a) Name the physiological process that was being investigated
b) State the expected results.
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c) Explain your answer in (b) above
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5 marks
a) State two ways in which plants get rid of their nitrogenous wastes. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ……………………………………………………………………………………………….
b) State two adaptations of the nephron of a desert animal.
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3 marks
a) State two ways in which plants get rid of their nitrogenous wastes.
2 marks
Name three plant cells that contain chloroplasts.
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2 marks