Reptiles first appeared during the _____ era. (Activity 25B)

Seed plants first appeared during the _____ era. (Activity 25B)

The _____ era is the era during which we live. (Activity 25B)

The first prokaryotic cells appeared during the _____ era. (Activity 25B)

Dinosaurs went extinct during the _____ era. (Activity 25B)

Animals first appeared during the _____ era. (Activity 25B)

_____ were the dominant vertebrate life form during the Paleozoic era. (Activity 25B)

The Cenozoic era began approximately _____ million years ago. (Activity 25B)

Life arose during the _____ era. (Activity 25B)

_____ were the dominant vertebrate life form during the Mesozoic era. (Activity 25B)

Flowering plants first appeared during the _____ era. (Activity 25B)

Most modern animal phyla evolved during the _____ era. (Activity 25B)

The Mesozoic era began approximately _____ million years ago. (Activity 25B)

Bony fish first evolved during the _____ era. (Activity 25B)

The Precambrian era began approximately _____ million years ago. (Activity 25B)