Before 1977, all organisms without a nucleus were placed in one kingdom. Why did scientists later place Archaea and Bacteria in two separate domains?
Archaea and Bacteria were found to live in very different types of habitat
Archaea and Bacteria were found to differ in the size and shape of their cells
Archaea and Bacteria were found to differ in their chemistry and their genes
Archaea and Bacteria were found to reproduce at very different rates
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.