Question
Mass extinctions occurred during all of the following periods except which one?a. Devonianb. Permianc. Triassicd. Cretaceouse. Carboniferous
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The options given are the Devonian, Permian, Triassic, Cretaceous, and Carboniferous periods. Show more…
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The ______ era had many extinctions because of large variations in climate. A. Precambrian B. Mesozoic C. Paleozoic D. Cenozoic
The mass extinction at the end of the Ordovician period was probably caused by $a$. the collision of Earth with a large meteorite. b. massive volcanic eruptions. c. massive glaciation on the southern continents and associated climatic changes. $d$. the uniting of all continents to form Pangaea. e. changes in Earth's orbit.
The mass extinction at the end of the Ordovician period was probably caused by a. the collision of Earth with a large meteorite. b. massive volcanic eruptions. c. massive glaciation on the southern continents and associated climate changes. d. the coming together of the continents to form Pangaea. e. changes in Earth's orbit.
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