Chapter 14: The History of Life
Biology
Section 1: Fossil Evidence of Change
Land Environments:
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Atmosphere:
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Clues in Rocks:
 A __________ is any preserved evidence of an organism.
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Fossil Formation:
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Dating Fossils:
 __________ __________ is a method used to determine the age of rocks by
comparing them with those in other layers.
__________ __________:
 Uses the decay of radioactive isotopes to measure the age of a rock.
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The Geologic Time Scale:
 The __________ __________ __________ is a model that expresses the major
geological and biological events in Earth’s history.
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 __________ of the Phanerozoic eon includes the Paleozoic, Mesozoic, and
Cenozoic eras.
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Each era is divided into one or more __________.
Precambrian:
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The Paleozoic Era:
 The ancestors of most major animal groups diversified in what scientists call the
__________ __________.
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The Mesozoic Era:
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 __________ __________ describes the movement of several large plates that
make up the surface of Earth.
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The Cenozoic Era:
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Section 2: The Origin of Life
Origins: Early Ideas
 __________ __________ is the idea that life arises from nonlife.
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 The __________ __________ __________ states that only living organisms can
produce other living organisms.
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Origins: Modern Ideas
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Making Proteins:
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Genetic Code:
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Cellular Evolution:
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Photosynthesizing Prokaryotes:
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__________ __________ __________:
 The ancestors of eukaryotic cells lived in association with prokaryotic cells.
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