Complete the following pairs of terms: [5]
(i) Variation : Inheritance : : ______ : Sudden Change
(ii) Ozone depletion : CFC : : ______ : SO2
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Answer:
1 mutation
2 NOX
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The pairs have been completed as follows:
(i) Variation : Inheritance : : Mutation : Sudden Change
(ii) Ozone depletion : CFC : : Acid Rain : SO2
1. Variation is caused due to inheritance. Information is passed on from the parents to the younger generations. Variation is caused due to recombination taking place between homologous chromosomes.
2. Ozone depletion is caused by CFC and Acid rain is caused by SO2.
Acid rain or acid precipitation is mainly caused by emission of nitrogen oxides and sulphur dioxide, which results due to human activities such as burning of fossil fuel.
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