Biology Trivia

1. Name the four general chronological eras of Earth's history corresponding to the simplified descriptions below

A) Earth formed; first primitive plants & animals appear...PRECAMBRIAN back to questions

 

 

 

 

 

 

 

 

 

 

B) Abundant invertebrates; fish & other vertebrates introduced; first forests and land animals appear; onset of reptiles...PALEOZOIC back to questions

 

 

 

 

 

 

 

 

 

 

 

 

C) Introduction of the first small dinosaurs, followed by a few types of mammals; great dinosaurs and first birds introduced ; end of the great dinosaurs...MESOZOIC back to questions

 

 

 

 

 

 

 

 

 

 

D) Domination of mammals; ice age begins, over takes much of the earth, and then come to an end...CENOZOIC back to questions