Chapter 23 {Mastering Bio} Scrolling of Evolution’s History Part I

Reptiles first appeared during the _____ era.

Paleozoic

We are living during the _____era.

Cenozoic

Dinosaurs went extinct during the _____.

Mesozoic

_____ were the dominant vertebrate life form during the Paleozoic era.

Amphibians

Life arose during the _____.

Precambrian

Flowering plants first appeared during the _____.

Mesozoic

The Mesozoic era began approximately _____ million years ago.

251

The Precambrian time began at least _____ million years ago.

4600

Seed plants first appeared during the _____.

Paleozoic

The first prokaryotic cells appeared during the _____.

Precambrian

Animals first appeared during the _____.

Precambrian

The Cenozoic era began approximately _____ million years ago.

65

_____ were the dominant vertebrate life form during the Mesozoic era.

Dinosaurs

Most modern animal phyla evolved during the _____ era.

Paleozoic

Bony fish first evolved during the _____ .

Paleozoic