3 The melting of the ice sheet — A allowed migrants to cross Canada on foot
B prevented migration across Beringia
C ended the coastal migration
D had no special impact on migration

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

How is france’s culture important to its economy

Which of the following is evidence to the past existence of glaciers?