Why some countries are much more developed than others?

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.

Which age groups shows the graestest diferrence between males and females

When you cross a time zone going east what happens to the time