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  Which of the following was a characteristic of trade between Native Americans and colonists?  

This is an important herbivore in kelp forests?

This was our most recent super continent?

These organisms have mechanisms for keeping their internal concentration of salt stable?

This is a common contaminant found in fish?

These resources result from the deposition, precipitation, or accumulation of useful substances in the ocean or seabed

In this type of chemical bond you are sharing electrons unequally?

Introduction by man, directly or indirectly, of substances or energy into the marine environment which results in deleterious effects?

This expedition took depth measurements showing the Artic Ocean is very deep, and collected data on wind driven water with depth leading to the idea of the Ekman spiral?

This density zone of the ocean has little change in density with increasing depth, and is 80% of all ocean water?