Phylogenies represent how different species or groups of organisms may be related through evolutionary time select the examples of how scientists use dna sequences to determine evolutionary relationships between species or groups of organisms to create phylogenies. -scientists compare dna sequences of the h1n1 flu virus to determine how many variants in a flu pandemic are resistant to the flu vaccine -scientists search the genomes of several mammals for a particular type of gene sequence and discover that hippos are more closely related to whales than camels -scientists use dna sequences to match biological evidence at a crime scene to the genetic makeup of a line of suspects in a crime investigation -scientists determine that the australian mole and the north american mole are closely related species because they both have enlarged front claws and thickened skin on their noses.