Year 12 Biology
Species, taxonomy and biodiversity
Defining a species and the classification system, phylogenetic relationships from DNA and protein evidence, measuring biodiversity and the index of diversity.
Species, taxonomy and biodiversity free practice
No timer and no account needed. Check each answer as you go, then read the explanation.
1. The numbers of base differences in a 200-base section of one gene, compared with species A, are 4 for species B, 22 for species C and 38 for species D. More differences suggest the species diverged further back in time. Which conclusion is best supported?
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