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Before or after industrialisation

Exercise and reference answers

Left
1850s
Items
  1. Item
    More white moths
    Answer
    1850s
  2. Item
    Lichens on trees
    Answer
    1850s
  3. Item
    Clean tree trunks
    Answer
    1850s
  4. Item
    More dark moths
    Answer
    1920
  5. Item
    Soot on the trees
    Answer
    1920
  6. Item
    White moths eaten
    Answer
    1920
Right
1920
Instructions
Swipe left for the 1850s, right for 1920.

Explanation

_Source: syllabus Biology, Ch 7 'Evolution'_
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