Question 3
The diagram below illustrates ecto-parasite living in organism. Study them and answer questions 3(a), (i), (ii), (iii), (b) and (c)
- Name
- Mention two parts of an organism in which the diagram labelled I lives [2 marks]
- State three ways of controlling the infestation of diagram II. [3 marks]
I. The diagrams labelled I and II [2 marks]
II. Two organism in which diagram labelled II can be found [2 marks]
III. One mode of feeding of the diagram labelled I [1 mark]
Observation
This question was attempted by majority of the candidates and their performance was good.
In part (a) majority of the candidates did very well in it. In part (b) some candidates did very well in it by mentioning correctly parts of an organism in which the diagram labelled I lives In part (c) majority of the candidates did very well in it, they were able to state ways of controlling the infestation of diagram II.
.
The expected answers are as follow:
(a) (i) Diagram labelled I
- louse / lice
Diagram labelled II
- tick
(ii) Organisms in which diagram labelled II can be found
- dog
- cattle/cow
- sheep
- goat
- cat
(iii) Mode of feeding by the diagram labelled I
- biting/piercing
- sucking
(b) Parts of an organism the diagram labelled I lives on
- head
- armpit
- private part / pubic region
(c) Ways of controlling the infestation of diagram II
- spray/dust insecticide on the body of the organism infected
- good sanitation of the environment
- dipping the animals/organisms in insecticide
- fumigate the surroundings where the organism lives