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प्रश्न
Before industrialisation, in collections made in the 1850s in England, which moths were more numerous on trees?
पर्याय
Dark-winged moths
White-winged moths
Melanic moths only in rural areas
No moths were seen on trees.
MCQ
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उत्तर
Collections made in the 1850s before industrialisation contained more white-winged moths than dark-winged moths. The tree trunks then had an almost white-coloured lichen background.
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