Taxonomy of Living Things Investigate the phylogenetic tree in the figure below. The phylogenetic tree is used to classify phyla of kingdom Animalia. Each branch of the phylogenetic tree represents a key characteristic. Ancestral Protist > < Multicellularity No tissues 1 2 True tissues 3 4 5 6 7 8 9 10 11 12 Porifera Cnidaria Ctenophora Platyhelminthes Nemertea Nematoda Rotifera Mollusca Annelida Arthropoda Echinodermata Chordata Map the evolution of major characteristics on the above phylogeny of the animal kingdom (1 pt each – 9 total) Branch Characteristic 1 No Tissues 2 True Tissues 3 4 5 6 Body Cavity Present (Psuedocoleom or True Coelom) 7 8 9 10 11 12
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Adi S.
A phylogenetic tree indicates common ancestors. indicates the organism's taxon. uses only derived characters. indicates common ancestors for each family. also includes the organism's order and class. 2) Homologous structures have identical functions. have fully divergent functions. are also called analogous structures. are shared by organisms of the same genus. are often shared by organisms in the same line of descent. 3) Similarities due to convergent evolution are called analogy. homology. taxonomy. phylogeny. cladistics. 4) Earth formed during the ______ geologic era. Mesozoic Cenozoic Precambrian Paleozoic None of the above
Sri K.
Answer these questions about the following cladogram. a. How many clades are shown in this cladogram? How are they designated in the diagram? b. What trait is shared by all animals in the study group? What traits are shared by only snakes and lizards? c. Which animals share the most recent common ancestor? How do you know?
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