Biology
Biology, 24.08.2019 16:30, ToriChristine

Which of the following is an example of a closed system?
an estuary where fresh and ocean water mix
a chemical reaction within deep ocean organisms allowing them to glow
a living single-celled organism such as a phytoplankton
a river that flows into the ocean

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Which of the following is an example of a closed system?
an estuary where fresh and ocean wat...

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