Before 1850 most peppered moths were pale in colour. After 1850 the bark of trees in industrial areas became darker with soot, and dark moths became much more common. Which statement describes what happened?
The pale moths changed their colour so that birds could not see them
The pale moths developed dark colouring because they needed to hide
The dark moths were better camouflaged, so more of them survived
The moths passed on the dark colour they gained during their lives
80 exam-style questions on AQA GCSE Biology 6.2 Variation and evolution, covering 6.2.1 Variation, 6.2.2 Evolution, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, and 6.2.5 Cloning. Each one has a worked solution and a mark scheme showing where the marks go.