A biologist discovers five new organisms. Their key features are shown in the table.
| Organism | Cell type | Cell wall | Mode of nutrition | Other features |
|---|---|---|---|---|
| P | Prokaryotic | Present (peptidoglycan) | Autotrophic (photosynthetic) | Unicellular |
| Q | Eukaryotic | Absent | Heterotrophic | Multicellular with a simple nervous system |
| R | Eukaryotic | Present (chitin) | Heterotrophic (saprophytic) | Multicellular, reproduces by spores |
| S | Eukaryotic | Present (cellulose) | Autotrophic (photosynthetic) | Multicellular, contains chloroplasts |
| T | Acellular | None | None | Contains a double-stranded DNA genome |
Describe how the features in the table can be used to assign each organism to the appropriate taxonomic group. Your answer should refer to domains, kingdoms, and virus classification as appropriate.