DNA sequence comparisons show species are closely related when

  1. their sequences are very different
  2. their sequences are very similar
  3. they have different numbers of genes
  4. they live in the same habitat
Answer

B) their sequences are very similar

Few differences = recent common ancestor. AS & A Level Biology · Topic 17 Selection and Evolution · 17.3 Evolution

Biology MCQ · More A Level Biology: Selection and evolution MCQs · Practise