The Cambrian explosion refers toGroup of answer choicesan ancient mass extinction eventthe origin of prokaryotesthe origin of eukaryotesthe invasion of the landthe sudden appearance of animals

The "Great Dying" is sometimes used to as another name for which event?Group of answer choicesThe dinosaur extinctionThe Cambrian explosionThe great oxidation eventThe end-Permian extinction

A mass extinction event occurred about 542 mya that marks the boundary between Precambrian time and the A. Cambrian Period B. Hadean Period C. Permian Period

Which of the following periods is the earliest during which animals may have appeared?Question 14Select one:a.Cambrian periodb.Ordovician periodc.Cryogenian periodd.Ediacaran period

(Q012) The Paleozoic Era ended with a mass extinction event that was likely caused byGroup of answer choicesthe formation of Pangaea.intense volcanic activity.the formation of high-latitude ice sheets.the evolution of land plants.

Through time, Earth underwent a series of cataclysmic events and resulting extinctions. This describes why the fossils found in each geologic layer are different species. This theory is known as ____Group of answer choices