A coastal survey records these nine seaweed species:
Ulva lactuca, Fucus vesiculosus, Laminaria digitata, Ulva intestinalis, Chondrus crispus, Fucus serratus, Palmaria palmata, Ulva compressa and Laminaria hyperborea.
Scientists are considering four revisions to the classification. In each proposal, only the named species changes genus, and the survey still contains nine separate species.
Which proposed revision would change the number of different-species pairs sharing a genus from 5 to 4, while changing the number of genera from 5 to 6?
Chondrus crispus is assigned to the genus Palmaria.
Laminaria digitata is assigned to the genus Ulva.
Fucus serratus is assigned to a newly named genus.
Ulva compressa is assigned to a newly named genus.
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.