Human DNA: CAT CCC CAC CAA. Which organism is most closely related? 30 cco Dog: ATG CTC CCG CAC Wolf: ATG CAC CCG CAC Cat: ATG CTC CCG ccc

## Step 1<br />The problem involves comparing the DNA sequences of three different organisms: a human, a dog, and a wolf. The DNA sequence of the human is given as CAT CCC CAC CAA. The DNA sequences of the dog and the wolf are given as ATG CTC CCG CAC and ATG CAC CCG CAC respectively.<br /><br />## Step 2<br />To find out which organism is most closely related to the human, we need to compare the DNA sequences of the three organisms. The organism with the DNA sequence that is most similar to the human's DNA sequence is the one that is most closely related.<br /><br />## Step 3<br />By comparing the DNA sequences, we can see that the dog's DNA sequence (ATG CTC CCG CAC) is most similar to the human's DNA sequence (CAT CCC CAC CAA). The difference between the two sequences is only one nucleotide, which makes the dog the most closely related organism to the human.