A student records four relationships between animals W, X, Y and Z.
Which additional statement must be correct if all four records are correct?
X and Z share a genus; W and Y share a family.
X and Z share a family; W and Y share an order.
X and Z share an order; W and Y share a genus.
X and Z share a class; W and Y share a family.
40 exam-style questions on AQA GCSE Biology 6.4 Classification of living organisms, covering 6.4 Classification of living organisms. Each one has a worked solution and a mark scheme showing where the marks go.