Brown Insects Living in a Dark Background Survived in a Ratio

question 18

Multiple Choice

Brown insects living in a dark background survived in a ratio of 90/120,while the same insects in a lighter background survived in a ratio of 30/120.The ratio of relative fitness of the insects in dark backgrounds to lighter backgrounds is given as

• A) 1 : 0.333.
• B) 0.40 : 0.60.
• C) 90 : 120.
• D) 1 : 0.
• E) 0.60 : 0.40.

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