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These are brown seaweeds that live in cold water?

What type of primary production occurs at hydrothermal vents?

This type of estuary forms as a result of land sinking due to movements of the Earth’s crust.

Toxic burden of a large number of organisms at a lower trophic level is accumulated and concentrated by a predator at a higher trophic level.

  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