BIOLOGY PAPER 3 (231/3) 2006 PRACTICAL QUESTIONS

BIOLOGY PAPER 3 (231/3) 2006

PRACTICAL QUESTIONS

1.  The photographs below are bones obtained from the same region of a mammalian body. Photograph labeled K are different views but same bone while M and N are views of different bones.

(a) Name the region from which the bones were obtained ( 1 mark)

(b) Identify the bones  ( 3 marks)

 K…………………………………………………………………..

 M…………………………………………………………………

 N………………………………………………………………….

(c) State three characteristics feature of the bone in photographs labeled K

( 3 marks)

(d) Name the structure that fit in the opening labeled P in the photograph of

bone K ( 2 marks)

(e) State the functions of the parts labeled S and T in photographs of bone K

( 2 marks)

(f) Name the structures that articulate with the parts labeled V in the

photographs of bone K ( 1 mark)

(g) Name the parts labeled U and Y in the photograph of bone M and R in the

photograph of bone N ( 3 marks)

2.  You are provided with two pieces of plant material labeled specimen D. Using a scalpel cut a slit halfway through the middle of each piece shown in the diagram below

Place one piece in the solution labeled L₁ and the other in solution labeled L₂ allow the set up to stand for 30 minutes.

(a) After 30 minutes remove the pieces and press each gently between the fingers

(i) Record your observations

 L₁……………………………………………………….  ( 1 mark)

 L₂……………………………………………………….  ( 1 mark)

(b) Examine the pieces

 i)  Record other observations beside those made in (a) (i) above

(3 marks)

 ii)  Account for the observations in (a) (i) above (5 marks)

 iii)  Account for the observation in (b) (i) above (2 marks)

3.  You are provided with three sets of seedlings labeled A, B and C. Examine

them

(a) State the conditions under which each set was grown (3 marks)

(b) State four different between the seedlings in set A and B  (4 marks)

(c) (i) Name the phenomenon exhibited by seedling in set B (1 mark)

(ii) Give a reason why plants exhibit the phenomenon named in (c) (i) above  (1 mark)

(d) Name the response exhibited by the seedling in set C (1 mark)

(e) Explain how the response named in (d) above occurred (3 marks)