The classification of organisms s based on the phylogeny of the organism, which is the study of evolutionary relationships. in the past, scientists would classify organisms based solely on their physical appearance, but today they also consider genetics and biochemistry when classifying. remember, the development of the new 6-kingdom classification system is based on biochemistry! review this image. based on the relationships among the animals, what statement seen here are true? check all that apply. a) sharks were the first animals to have jaws. b) reptiles and birds produce amniotic eggs. c) only mammals are warm blooded. d) amphibians are the first animals to have true bones. e) all the animals in this diagram are vertebrates. f) ray-finned fish and sharks are similar in that they both have paired appendages and jaws.