Are seafloor spreadings the same thing as ocean basins?

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm