What are some reasons to say that continental drift will not continue?

Which of the following is not an effect of land substance

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 do convection currents form underwater mountains?