Which of the following periods is the earliest during which animals may have appeared? a. Ordovician period b. Cambrian period c. Ediacaran period d. Cryogenian period

Which mechanism of fossil formation created a replica of an organism's original form? a natural cast b amber-preserved c permineralization d trace fossil

Why is there an argument among scientists about recognizing Anthropocene as an epoch?

Which fossil would be the oldest in a given strata and why?

2. The Paleozoic Era extended over which of the following time periods in the fossil record? A. the Cenozoic Era, from the end of the Cretaceous into the Tertiary and Quaternary Periods B. the "age of reptiles", from 251 million years ago to 65 million years ago C. the "age of birds and mammals", from 65 million years ago to the present day D. the "age of fishes", from 542 million years ago to 251 million years ago E. the Mesozoic Era, from the start of the Triassic into the Cretaceous Period

What years was the Eocene period? Did Euprimates appear during this time?

After the Great Dying, we enter the Era which covers the evolutionary history of the dinosaurs up until they go extinct. Cambrian O Mesozoic Paleozoic O Cenozoic

Approximately when did life first appear on land A. 500 million years ago B. 2 billion years ago C. 700 million years  D. 1.5 million years ago

What patterns in the fossil record would support that organisms have evolved?