If two organisms look completely different, but you suspectthey may be related,
ID: 2916 • Letter: I
Question
If two organisms look completely different, but you suspectthey may be related, which of the following would be the mostuseful information to have? A. fossils B. anatomical information C. DNA comparisons D. None of these answers is useful. My book talks about how fossils, comparative anatomy, lifecycle information, and biochemical and molecule information areused in phylogeny. I've eliminated D. I thought that fossils wouldbe useful if the organisms looked alike, but since they don't, Ieliminated A too. Would anatomical information be usefulonly if they looked alike too? Would the answer be C. DNAcomparisons? If two organisms look completely different, but you suspectthey may be related, which of the following would be the mostuseful information to have? A. fossils B. anatomical information C. DNA comparisons D. None of these answers is useful. My book talks about how fossils, comparative anatomy, lifecycle information, and biochemical and molecule information areused in phylogeny. I've eliminated D. I thought that fossils wouldbe useful if the organisms looked alike, but since they don't, Ieliminated A too. Would anatomical information be usefulonly if they looked alike too? Would the answer be C. DNAcomparisons?Explanation / Answer
Using bioinformatics software such as ClustalW, the two 18SrRNA gene sequences can be aligned to find similarities, thusinferring sequence homology between the two. The more similaritiesthere are; phylogenetic analysis suggests that these two are moreclosely related and may have diverged just recently.