Two microorganisms look alike using an early microscope. A more powerful microscope shows that neither has a nucleus. Chemical analysis later places them in different domains.
Which statement best accounts for all these observations?
Both belong to Eukaryota, but their visible structures differ.
Both belong to Bacteria, but their chemical processes differ.
One belongs to Eukaryota, although both lack a nucleus.
One belongs to Archaea, although both lack a nucleus.
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.