three Evolutionary Faunas; standardization; early experimentation

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standardization

................ takes time for animals to refine their bodies

Third evolutionary fauna

.................. is modern fauna

early experimentation

Early animals show the broadest range of body plans and forms in all of Earth's history Many of these early experiments went extinct This sort of evolutionary behavior is called ..............,

three Evolutionary Faunas

Over the course of the Phanerozoic Eon, there have been recognized ......................... Each new fauna replaces the old fauna in time Each of these Evolutionary Faunas is defined by the dominance of a specific group of organisms Each was dominant during a different time

second Evolutionary Fauna

The ............. is the Paleozoic Fauna whose fossils dominate in the Paleozoic This fauna quickly replaces the Cambrian fauna As the Paleozoic Fauna emerges, the Cambrian fauna slowly moves offshore into deeper waters New Evolutionary Faunas show up nearshore and slowly push older Evolutionary Faunas offshore

first Evolutionary Fauna

The ...................... is the Cambrian Fauna whose fossils dominate in the Cambrian This early fauna is one that is very short‐lived


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