Which of the following features would be characteristic of oceans but – McqOptions

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1.	Which of the following features would be characteristic of oceans but not of freshwater ecosystems?
A.	Receives material from land mostly via ground water.
B.	Seasonal mixing of materials.
C.	Elements buried in bottom sediments for long periods of time.
D.	Bottom waters frequently lacking oxygen.
Answer» D. Bottom waters frequently lacking oxygen.

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