Question 1
Paper 2Easy5 marksA botanical team reviewed a classification in which flowering plant species A and B were grouped together because their flowers have a similar shape. The team compared the same 12-base region of DNA in the three species.
| Species pair | Number of base differences |
|---|---|
| A and B | 12 |
| A and C | 2 |
| B and C | 10 |
(a)[1]
Identify the pair with the most similar DNA sequences.
(b)[2]
Does the DNA evidence support classifying A and B as the closest relatives among these three species? Justify your answer using one comparison from the table.
(c)[2]
Suggest why classification based on flower shape could have been misleading.