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This is what we call ice anchored to a landmass or shallow continental shelf?

This is the study of classification?

This is when you have the same concentration of dissolved substances inside/outside the organism?

Multiple classes make up a ?

The set of conditions under which an organisms exists in nature

When only a portion of the life of the plankton is spent in the plankton?

This scientist emphasized environmental pressures on varieties and species  forcing them to become adapted to their local environment

The dark, vast bulk of the ocean where sunlight never reaches?

Which of these is a biological factor?

The organisms live in hot sulfur springs?