What is wrong with the Artic ecosystem

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.

What is unusual about the iraq mountains ,in spite of their old age?

The separation of northern ireland from the republic of ireland is an example of