Evolution of animal diversity
Science of Zoology and Evolution of animal diversity
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A Legacy of Change
Evolutionary diversification of Hawaiian honeycreepers
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Science of Zoology (1)
Zoology:
The scientific study of animals
Phylogeny or phylogenetic tree:
A diagram depicting the history of animal life
Branches represent evolutionary lineages
Each branching event represents the historical splitting of an ancestral species to form new ones
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Science of Zoology (2)
One major goal of studying animal diversity is to locate the origins of certain key developments such as multicellularity, a coelom, spiral cleavage, vertebrae, and homeothermy
Another goal is to understand historical processes that generate and maintain diverse species and adaptations
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Essential Characteristics of Science
Science is guided by natural law
Science must be explanatory by reference to natural law
The conjectures of science are testable against the observable world
The conclusions of science are tentative and therefore not necessarily the final word
Science is falsifiable
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Scientific Method
Hypothetic-deductive Method:
Scientific process of making a conjecture and then seeking empirical tests that potentially lead to its rejection
One begins this process by generating hypotheses, or potential explanations of a phenomenon of nature
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