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प्रश्न
Which type of selection is industrial melanism observed in moth, Biston betularia?
विकल्प
Stabilising
Directional
Disruptive
Artificial
MCQ
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उत्तर
Directional
Explanation:
Industrial melanism in Biston betularia favoured the melanic (dark) form when soot-darkened trees made dark moths less visible to predators, shifting the population mean toward darker phenotypes.
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