A student states that the fossils discovered by Richard Leakey are older than Lucy because they appear more like modern humans. Which correction is valid?
Leakey fossils are older; their age is about 4.4 million years.
Leakey fossils are younger; their age is about 1.6 million years.
Lucy fossils are younger; their age is about 1.6 million years.
Lucy fossils are older; their age is about 4.4 million years.
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.