Each candidate should be provided with the following:
Brown ear tick labelled A
Sweet potato tuber attacked by the potato weevil labelled C
Re - enforcement bar (1/2m long) labelled D1
Unburnt brick labelled D2
U - Nail labelled D3
Cheap timber (12in *1in, 1/2m long) labelled D4
Fine wire mesh 15cm * 15cm labelled D5
Engine oil labelled F
Grease labelled G
Bidens Pelosi (black jack), labelled K1
Digitaria scalarum (couch grass), labelled K2
Oxalislatifolia (oxalis), labelled K2
K1, K 2 and K3 must be whole and mature plants. K1 must bear fruits . Hand lens.
1. Your are provided with specimen A
a) Using a hand lens, observe and identify the specimen.
b) Draw and label the dorsal view of the specimen in the space below.
c) State three observable adaptations of the specimen that enable it live successfully.
i) .........................................................................................................................
ii) .........................................................................................................................
iii) ........................................................................................................................
d) Name three effects of specimen A on its host.
i) .............................................................................................................................
ii) ..............................................................................................................................
e) Give three ways of controlling specimen A.
i) .................................................................................................................................
ii) .................................................................................................................................
iii) ................................................................................................................................
2. You are provided with specimen D1, D2, D3, D4 and D5 which are used for making farm structures.
a) Identify each specimen
D1 .................................................................................................................................
D2.....................................................................................................................
D3...................................................................................................................................
D4..................................................................................................................................
D5....................................................................................................................................
b) State one farm structure where each specimen may be used.
D1..................................................................................................................................
D2..................................................................................................................................
D3..................................................................................................................................
D4....................................................................................................................................
D5....................................................................................................................................
c) How is each specimen used in the contribution of the farm structure identified in (b) above?
D1....................................................................................................................................
D2.................................................................................................................................
D3.......................................................................................................................................
D4..........................................................................................................................................
D5...................................................................................................................................
d) What can be done to each of specimen D2 and D4 to make them last longer.
D2........................................................................................................................................
D4......................................................................................................................................
3. You are provided with specimen C which has been damaged by a pest.
a) Cut the specimen to expose the damage and describe what you observe.
b) Suggest the pest responsible for the damage you have described in (a) above.
c) Give four control measures for the pest.
i) .........................................................................................................................
ii) ...........................................................................................................................
iii) .........................................................................................................................
iv) ........................................................................................................................
4. You are provided with specimens F and G which are used in farm machinery.
a) Identify each specimen.
F ..................................................................................................................................
G .................................................................................................................................
b) Give four functions common to both specimens.
i) .......................................................................................................................
ii) ........................................................................................................................
iii) ..........................................................................................................................
iv) .........................................................................................................................
c) State two parts of a farm machine where each specimen can be use
F .................................................................................................................................
G................................................................................................................................
d) Give two properties that make F suitable for use in the parts stated in (c) above.
i) ....................................................................................................................
ii) ....................................................................................................................
e) State four contaminants of specimen F.
i) ...................................................................................................................
ii) ...................................................................................................................
iii) ....................................................................................................................
iv) .....................................................................................................................
5. You are provided with specimens K1, K2 and K3.
a) Give four ways in which the specimens affect crop production.
i) .......................................................................................................................
ii) ........................................................................................................................
iii) .........................................................................................................................
iv) .........................................................................................................................
b) Using observable features explain how each specimen is adapted to its way of life.
K1..........................................................................................................................................
K2..........................................................................................................................................
K3........................................................................................................................................
c) Describe the mechanical method of controlling K2.