None of the reptiles from the Cretaceous period survived the end-Cretaceous mass extinction.
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Glacial environments are an example of a transitional deposi…
Glacial environments are an example of a transitional depositional environment.
Birds evolved during the Jurassic.
Birds evolved during the Jurassic.
Dinosaurs are examples of ____.
Dinosaurs are examples of ____.
Of the three rock types, igneous rocks are the best suited f…
Of the three rock types, igneous rocks are the best suited for radiometric dating techniques.
Which animal below is a mammal?
Which animal below is a mammal?
The Ornithiscian dinosaurs are known as the lizard-hipped di…
The Ornithiscian dinosaurs are known as the lizard-hipped dinosaurs.
Tyrannosaurus rex is an example of a theropod, a lizard-hipp…
Tyrannosaurus rex is an example of a theropod, a lizard-hipped dinosaur.
Which mammals reproduce and give birth live young?
Which mammals reproduce and give birth live young?
In North America, the Devonian period is subdivided into the…
In North America, the Devonian period is subdivided into the Pennsylvanian and Mississippian periods.