Scientists used to classify organisms into five kingdoms. Genetic analysis has led to the suggestion of a three domain system.
Name the three domains.
Describe how genetic analysis led to the suggestion of the three domain system.
A microorganism lives in hot springs at 90 ∘C90\ ^{\circ}\text{C}90 ∘C. Its cells have no nucleus. Its DNA is very different from the DNA of bacteria.
Explain which domain this microorganism belongs to.
40 exam-style questions on Edexcel GCSE Biology 4.2 Evidence for evolution and classification, covering 4.2.1 Fossil evidence for human evolution, 4.2.2 Stone tool evidence for human evolution, 4.2.3 Pentadactyl limb as evidence, and 4.2.4 Three domains classification. Each one has a worked solution and a mark scheme showing where the marks go.