A student uses the three-domain system to classify two groups of organisms.
| Group | Description |
|---|---|
| M | Ancient bacteria-like microbes; many members live in very harsh habitats |
| N | Organisms with complex cells, including protists, fungi, plants and animals |
Name the domain used to classify each group.
Name the remaining domain in the three-domain system.
Scientists discover microorganism P. They compare its molecules with molecules from organisms in groups M and N.
| Group used for comparison | Mean similarity to the molecules of P in % |
|---|---|
| M | 93 |
| N | 41 |
Suggest whether microorganism P should be placed in group M or group N. Use the results in the table.
81 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.