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CHAPTER 1 Study Guide: Science of Zoology & Evolution of Animal Diversity1.1A Legacy of ChangeMajor feature of life’s history is a legacy of perpetual change.1.Fossil record is imperfect, but records the broken history of evolution.2.Organic evolution is the major feature of life.Theory of perpetual change is evolution.1.Zoology is the scientific study of animals.2.Life’s multicellular animal history began more than 600 million years ago.3.Phylogeny is the branching sequence of evolution.4.Newly formed species gain their characteristics and modifications from previous species.5.Two major goals: 1) Reconstruct phylogeny of animal life, and 2) Understand historical processesthat generate and maintain diverse species and adaptations throughout evolutionary history.6.Significant steps in evolutionary origins include multicellularity, a coelom, spiral cleavage,vertebra, and homeothermy.1.2Principles of Science1.Science is a way of asking about the natural world to obtain precise answers.2.O...