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snipersaysaye
2021-01-14 11:58:33
The principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is _______. a. surface area b. water depth c. temperature d. salinity
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u895rug8
2021-01-14 12:58:24

The principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is "D. Salinity," since this is a measurement of salt content. 

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