3. Molecular biology shows that. The more similarities in the DNA sequence (genetic code) mean the organisms are more closely related It shows that more similarities means we do not share a common ancestor at all

## Step 1<br />The problem is about the relationship between the degree of similarity in DNA sequences and the closeness of the relationship between organisms. <br /><br />## Step 2<br />In molecular biology, the degree of similarity in DNA sequences is often used as an indicator of the closeness of the relationship between organisms. This is because organisms that are closely related are likely to have a high degree of similarity in their DNA sequences.<br /><br />## Step 3<br />The statement that more similarities mean we do not share a common ancestor at all is incorrect. In fact, the opposite is true. The more similar the DNA sequences of two organisms are, the more likely it is that they share a common ancestor.