Observation

Candidates’ performance in Question 1 was below average.                                                        
(a)        Many candidates could not draw and label parts of the land snail as
well as state the features of its housing unit. Furthermore, some candidates
misconstrued the insect pests of sheep with the predators of the land snail.
            (b)        Many candidates were unable to state the ways in which the productivity
of farm animals could be enhanced.

The expected answers include:          
1.  (a)   (i)         Diagram of a land snail

                  

(ii)        Features of a good housing unit for rearing snails

• It must have shade
• Must be secured against pests 
• It should contain loam soil rich in humus
• Housing unit must be escape proof
• It must be well ventilated
• Separate apartment for adult snails and young snails (snailets)
• Environment must be moist
• Must facilitate easy cleaning⁄ ease of management
• Avoid excess light in the snail pen
• Soil must not be acidic
• Secured against predators
• Protect snails from excessive wind
• Soil should be sandy to minimize waterlogging
• Sufficient space for snails to graze freely

            (iii)       Predators of land snails
-    Frog                       -    Snake                     -    Rodent/rat
-    Monitor lizard        -    Agamma lizard      -    Shrew
-    Hawk                     -    Crow                      -    Millipede
-    Centipede              -    Firefly larvae         -    Salamander
-    Beetle                     -    Mites                      -    Nematode
-    Spider                    -    Bear                       -    Crab
-    Cat                         -    Dog                        -    Toad
(b)       Insect pests of sheep
-    Wool maggot⁄ maggot                   -    Housefly
-    Botfly/warble flies                         -    Sheeplice⁄ lice
-    Biting midges⁄ mites                      -    Black flies
-    Mosquitoes                                    -    Stable fly
-    Tsetsefly

(c)        Ways of enhancing the productivity of farm animals

• Through animal improvement methods/Introduction/Selection/Breeding/Artificial insemination
• Ensure proper sanitation
• Isolation of sick animals
• Quarantine of newly introduced animals/stock
• Adopt good disease control measures
• Adopt good pest control measures
• Use of improved feed and feedstuff⁄ improved nutrition⁄ balance diet
• Avoid inbreeding
• Provision of adequate water
• Use of appropriate drugs
• Use of appropriate vaccines
• Keeping up to date records
• Replace damaged structures
• Ensure proper biosecurity