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Which conclusion can be made based on existing fossil evidence?
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
Which is the most probable reason that few Precambrian fossils are found today?
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
The climate that existed during the Silurian Period can best be determined by studying
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
Which fact provides the best evidence for the scientific theory of the evolutionary development of life on the Earth?
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
The fossil record provides evidence that primitive humans were alive on Earth at the same time as the
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
Theories of evolution suggest that variations between members of the same species give the species greater probability of
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
Which statement is best about dinosaurs?
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
Which inference can be made about the fossil record?
mammoths
They became extinct before the Cenozoic Era.
surviving environmental changes
Many life forms have become extinct.
fossils found in the bedrock
Precambrian organisms had few, if any, hard parts.
Characteristics of simpler forms of life can be found in more complex forms of life.
A great variety of plants and animals existed during the Precambrian Era.
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