V. W. Ekman is credited with developing the theory of: wind-driven ocean currents
seismic profiling
sea floor spreading
global tectonics

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

What best describes emerging scientific ideas

How are fossils used to date organisms?