A whale flipper and a human arm contain the same basic arrangement of bones but have different functions. Which conclusion is best supported?
The limbs evolved because the animals perform identical movements.
The limbs were inherited from a shared evolutionary ancestor.
The limbs show that whales evolved directly from modern humans.
The limbs show that bone arrangement depends only on habitat.
44 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.