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KCSE CLUSTER TESTS 20

Biology Paper 1

1.

Name the branch of biology that deals with the study of cells in the body of organisms.

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1 marks

2.

Why is that a father can only transmit haemophilia to his daughter but not to his son?

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1 marks

3.

Explain why amoeba does not have a specialized structure for gaseous exchange.

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1 marks

4.

The table below gives the information about an aquarium community that is ecologically balanced.

Draw a food web using six arrows to show the feeding relationship among the organisms.

1 marks

5.

Name the organelles that

i) Secretes mucin- glycoproteins

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ii) Provides the site of protein synthesis

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iii) Destroys disease causing micro-organisms

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3 marks

6.

a) Write two structural differences between red blood cells and white cells.

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b) What is the role of the following in blood clotting process?

i) Thromboplastin

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ii) Calcium ions

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5 marks

7.

Distinguish between homologous and

a) Analogous structures

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b) Give two advantages of natural selection

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4 marks

8.

The diagram below shows part of a flower

a) Name the part labeled Q

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b) State the function of R

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c) State the type of ovary the flower has

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d) Give a reason for your answer in (c) above.

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4 marks

9.

Explain why an athlete after winning 100metres race breath move quickly and deeply.

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3 marks

10.

Describe the sequences of events that occur in the eye for one to be able to see clearly if one moves from a dark room to a bright light.

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3 marks

11.

Study the diagrams below and answer the questions that follows

a) What was the aim of the experiment

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b) Explain why leaf A is still attached onto the plant.

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c) What property of sodium hydroxide enables it to carry out its intended role?

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d) In the test for starch in either leaf A or B, name the role played by methylated spirit

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4 marks

12.

What are the classes of the following organisms. (2mks)

a) Maggots

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b) Platypus

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4 marks

13.

The diagram below is a mammalian bone.

a) State the function of the part labeled K and L.

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b) State the region of the body where this bone is found.

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3 marks

14.

An animal is found to have large glomeruli and short loop of Henles. Account for the presence of

i) Large glomeruli (1mk)

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ii) Short loop of Henle (1mk)

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iii) State the possible aquatic habitat (1mk)

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3 marks

15.

a) Name a growth inhibitor in seeds;

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b) Apart from radicle, name two other parts of a seed embryo

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3 marks

16.

a) Define the following terms as used in microscopy (2mks)

i) Resolution

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ii) Field of view

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b) State functional disadvantage of electron microscope

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3 marks

17.

Two equal strips A and B were from a potato whose cell was 30% of sugar. The strip A was placed in a solution of 10% sugar concentration while strip B was placed in 50% sugar concentration. a) What change was expected in strips A and B?

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b) Account for the change in strip A.

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4 marks

18.

The lungs and ileum are adapted for absorption. State three features they have in common which facilitate absorption.

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3 marks

19.

a) Ascaris lumbroides is an endo-parasiteLiving in the ileum of human beings, while Tagetes minutes is a notorious weed in our farms. Identify the generic parts of the organisms mentioned.

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b) Under which circumstances are two organisms considered to belong to same species.

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4 marks

20.

What would happen if a person produced

a) Less anti-diuretic hormone?

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b) What term is given to the condition described in (a) above?

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4 marks

21.

a) State the role played by jelly like substances surrounding egg laid by frogs

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b) Describe what happens when sperm head hit the egg in human beings.

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4 marks

22.

Name the causative agent of the following diseases:

a) Amoebic dysentery

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b) Tuberculosis

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4 marks

23.

Describe how saturation deficit affect the rate of transpiration

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1 marks

24.

a) The length from the tail tip to the anus in a fish is 8cm whereas that from the tail tip to the mouth tip is 24cm. Calculate the tail power of the fish

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b) What is the significance of the high tail power in fish locomotion

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1 marks

25.

Use the graph below to answer the questions that follows:

a) Calculate the difference in nitrate concentration between the highest and lowest.

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b) How can increase in nitrate concentration in the river lead to death of fish?

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c) Suggest a possible source of nitrate that lead to the pollution in river.

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3 marks

26.

Name the type of joints formed when bones articulate at the following parts

i) Acetabulum

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ii) Sigmoid notch

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3 marks

27.

a) Name the structures labeled 3,4

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b) State the function of the parts labeled 5 and 7.

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4 marks

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