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During which era did the first fish develop?
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24. History of Life on Earth
History of Life on Earth
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In which of the following time periods were dinosaurs the dominant creatures?
A
Devonian
B
Triassic
C
Jurassic
D
Cambrian
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Understand the timeline of Earth's history and the major eras: Paleozoic, Mesozoic, and Cenozoic.
Recognize that dinosaurs were dominant during the Mesozoic Era, which is divided into three periods: Triassic, Jurassic, and Cretaceous.
Identify the time periods listed in the problem: Devonian, Triassic, Jurassic, and Cambrian.
Note that the Devonian and Cambrian periods are part of the Paleozoic Era, which predates the rise of dinosaurs.
Conclude that the Jurassic period, part of the Mesozoic Era, is when dinosaurs were the dominant creatures.
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