What are the two main regions that divide the seafloor?

Wind energy is plentiful in regions with vast open spaces it is a non polluting renewable resource what could be an economic factor that makes the use of this resource less feasible then non renewable resource even in such regions

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

Por qué crees que los huevos con cáscara se llaman amnióticos?