Observation

This question was attempted by many candidates and their performance was very good.  In part (a)(i) candidates defined vitamins and in (ii) candidates also listed factors that may lead to unbalanced diet.  In part (b) candidates correctly stated ways of controlling insect borne diseases.

 

However, the expected answers are as follows:

8 (a)(i) VITAMINS

vitamins are organic substances/ produced in plants and animals/ found in food

 required/essential in small quantities/for healthy growth/good health

                                                                         

 

     (ii)   FACTORS THAT MAY LEAD TO UNBALANCED DIET    

poverty

poor eating habit/excessive consumption of a particular food

illiteracy/ignorance

weather/climate

scarcity/unavailability of food

  (b)      WAYS OF CONTROLLING INSECT – BORNE DISEASES

keep the surrounding/environment clean

wear protective clothing

keep houses and surrounding ventilated and illuminated at all time

keep food covered

use/spray insecticides to kill insects like mosquitoes, cockroach, house flies etc

drain of stagnant water/put oil on water surfaces

use nets on beds and windows

introduce biological predators