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Biology Paper 3 Practical Question Paper

Biology Paper 3 Practical

Course:Secondary Level

Exam Year:2010

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Name……………………………………………………………. Index No……………………………..
School…………………………………………………………… Candidate’s sign…………………….
Date………………………………….
231/3
BIOLOGY
PAPER 3
PRACTICAL
July/August 2010
Time: 1 ¾ hrs
MANGA DISTRICT JOINT EVALUATION TEST – 2010
Kenya Certificate of Secondary Education (K.C.S.E)
BIOLOGY
PAPER 3
PRACTICAL
July/August 2010
Time: 1 ¾ hrs
Instruction to candidates
1. Write your name and index number in the spaces provided at the top of this page.
2. Sign and write the date of examination in the spaces provided above.
3. Answer all the questions.
4. You are required to spend the first 15 minutes of the 1 ¾ hours allowed for this paper reading the
whole paper carefully before commencing your work.
5. Answers must be written in the spaces provided in the question paper.
6. Additional pages must not be inserted.
For Examiner’s Use Only.
Question Maximum Score Candidate’s Score
1 15
2 10
3 15
TOTAL 40
This paper consists of 8 printed pages. Candidates should check the question paper to
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Ensure that all the pages are printed as indicated and no questions are missing.
1. Below is a photograph of a dissected mammal. Examine the photograph.
(a) Name the parts labeled A, B, C,D,F and H (6mks)
A: ……………………………………………………………….
B: ……………………………………………………………….
C: ……………………………………………………………….
D: ……………………………………………………………….
F: ……………………………………………………………….
H: ……………………………………………………………….
(b) State the functions of the structures labeled E and G. (2mks)
E
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….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
G
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
(c) (i) Name the sex of the mammal in the photograph. (1mk)
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
(ii) Give a reason for your answer in (c) (i) above.
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
(d) From the photography identify one feature that helps classifying the organism into class
mammalian. (1mk)
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
(e) (i) The actual length of the tail from Y to Z in the photograph is 20cm. Calculate the
Magnification of the photograph. (2mks)
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
(ii) Calculate the actual length of the mammal from the neck marked X to the point marked Y on
the tail. (2mks)
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
….……………………………………………………………………………………………………
……………………………………………………………………………………………………….
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2. You are provided with a food substances labeled J. Using the reagents and filter paper provided
carry out tests to determine the food substance(s) in substance J. (10mks)
Food substances
being tested for
Procedure
Observations
Conclusions
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3. You are provided with specimens labeled K1 , K2, K3, K4, K5 and K6. Use the dichotomous key
provided to identify them.
Using the observable features in the photographs complete the dichotomous key given below.
(3mks)
1 a leaf simple……………………………………………… Go to 2
1 b leaf compound …………………………………………. Go to 5
2 a leaf needlelike ………………………………………….. Go to 3
2 b ………………………………………………………….. Go to 4
3 a leaf compact ……………………………………………. panaceae
3 b leaf hollow ……………………………………………… A maryllidaceae
4 a leaf withstand serrated margin …………………………. verbenaceae
4b …………………………………………………………... Nyctaginaceae
5a leaf palmate …………………………………………….. Euphorbiaceae
5b …………………………………………………………… Oxalidaceae
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(b) Use the completed dichotomous key to identify the family to which each plant belongs. In
each case show the steps you followed to arrive at the identity.
Identity Steps followed
KI …………………………………… ………………….………………………………
K2 …………………………………... ……………….…………………………………
K3 ………………………………….. ………………………………………………….
K4 ……………………………….…. …………………………………………………..
K5……………………………………. …………………………………………………..
K6 …………………………………. …………………………………………………..
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END

Biology Paper 3 Practical Question Paper

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