Ardi has adaptations for climbing as well as features associated with upright walking. Lucy has stronger evidence of upright walking but still has some climbing adaptations. Which conclusion is justified?
The fossils prove Lucy descended directly from the particular Ardi individual found.
The fossils show climbing adaptations developed only after fully upright walking evolved.
The fossils prove every feature changed at the same rate in both organisms.
The fossils suggest a change in locomotion while some ancestral features remained.
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.