Question:
Before industrialization in Great Britain, which insects had a higher population?
Before industrialization in Great Britain, which insects had a higher population?
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Before industrialisation the tree trunks were light in colour. This favoured the light-coloured moth.
Updated On: Nov 12, 2026
- Biston betularia
- Aphid crocci
- Cactoblastis cactorum
- Biston carbonaria
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
The peppered moth shows natural selection. It has a light form, Biston betularia, and a dark form, Biston carbonaria.
Step 2: Before industrialisation
Tree trunks were pale because of lichens. The light moths blended in and escaped bird predation, while the dark moths were easily seen and eaten.
Step 3: Conclusion
So the light form Biston betularia was more numerous.
Final Answer:
Biston betularia had the higher population before industrialisation. \[ \boxed{\text{(A) }\text{Biston betularia}} \]
The peppered moth shows natural selection. It has a light form, Biston betularia, and a dark form, Biston carbonaria.
Step 2: Before industrialisation
Tree trunks were pale because of lichens. The light moths blended in and escaped bird predation, while the dark moths were easily seen and eaten.
Step 3: Conclusion
So the light form Biston betularia was more numerous.
Final Answer:
Biston betularia had the higher population before industrialisation. \[ \boxed{\text{(A) }\text{Biston betularia}} \]
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