Kericho /Kipkelion Districts Mock Examination

NAME…………………………………………………………………INDEX NO………………...

SCHOOL…………………………………………………………………….…………………………

231/3

BIOLOGY

PAPER 3

THEORY

JULY / AUGUST 2008

TIME: 1 ¾ HOURS

KERICHO /KIPKELION DISTRICTS MOCK EXAMINATION

Kenya Certificate of Secondary Education 2008

231/3

BIOLOGY

PAPER 3

JULY / AUGUST 2008

INSTRUCTIONS TO CANDIDATES

v Answer all questions in this paper

v You are required to spend first 15 minutes of 1 ¾ hrs allocated for this paper to read through questions before beginning practical.

v Answers must be written in spaces provide on question paper.

v All drawings must be in pencil

v Additional pages should not be inserted

For Examiners Use Only

Question / Maxi. Score / Candidates Score
1 / 13
2 / 12
3 / 15
TOTAL / 40

Q1. You are provided with specimen labelled J, and a solution S

(a) (i) State the habitat of specimen J (1mk)

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(ii) Name the trophic level occupied by specimen J (1mk)

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

(b) (i) Place 5cm3 of solution S into 100ml beaker. Using a straw, blow gently into the solution. Record your observation. (1mk)

(ii) Give a reason for the observation in b(i) above. (1mk)

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(c) Place 5cm3 of a solution S into two 100ml beakers labeled 1 and 2. Using a pair of forceps, submerge specimen J into beaker labeled 1. Put the two beakers in the dark cover the beakers with black polythene papers Leave the set up for at least 30 minutes and observe.

(i) Record your observation. (2mks)

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(ii) Explain observation in (c) (i) above. (3mks)

(d) (i) Predict what would be observed, if another 100ml beaker labeled 3 containing solution S and submerged specimen J is placed in light

Observation (1mk)

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(ii) Reason for answer in d (i) above (2mks)

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Q2. You are provided with four specimens labeled K, L M and N. These specimens were obtained from the same animal.

(a) Name each of the specimens K, L, M and N (2mks)

K …………………………………………………………..

L …………………………………………………………..

M …………………………………………………………..

N …………………………………………………………..

(b) From which part of the body was each specimen obtained? (2mks)

K …………………………………………………………..

L …………………………………………………………..

N …………………………………………………………..

M …………………………………………………………..

(c) Examine the ends of specimen K. Giving a reason; name the type of joint that would be found in the animal at the proximal and distal end of the specimen.

(4mks)

(i) Type of joint at proximal end …………………………………………………………………………………..

Reason……………………………..…………………………………………………………………………………………………………………………………………………

(ii) Type of joint at distal end ……………………………………………………………

Reason…………………………………………………………………………………………………………………………………………………………………………………

(d) Examine specimen N and State two functions of the process that extends beyond the notch. (2mks)

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(e) State two ways by which specimen M is adapted to its functions. (2mks)

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Q3. You are provided with a specimen labeled R. Make a transverse section through the specimen.

(a) Draw and label the transverse section of the specimen. (4mks)

Workout the magnification of your drawing. Show your working clearly. (1mk)

(b) What type of fruit is specimen R? (1mk)

(d) (i) Name the agent of dispersal of specimen R (1mk)

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(ii) Give four adaptive features of the specimen that make it be dispersed by the agent named in d (i) above. (2mks)

(e) Squeeze the juice from specimen R into a 35ml plastic beaker using the reagents provided, test for food substances in the juice. Record the food substances, procedures, observations and conclusion in the table below. (4mks)

Food substance / Procedure / Observations / Conclusions

(f) Name the deficiency decease in human that would result from lack of fruit in the diet. (1mk)

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