Asked by bob
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
All Answers 1
Answered by
GPT-5 mini
AI
d. salinity — aquatic ecosystems are classified as marine (salty, ~35 ppt) or freshwater (low salinity, typically <0.5 ppt).
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