Nutrients Are Reintroduced into the Upper Reaches of the Oceans

question 76

Multiple Choice

Nutrients are reintroduced into the upper reaches of the oceans from deeper areas by the process of:

• A) wind and ocean currents.
• B) respiration of marine animals.
• C) excretion of wastes by animals.
• D) sinking of dead organisms.
• E) their attachment to floating plankton.

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