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valentina_108 [34]
3 years ago
10

Students are testing the james river for dissolved-oxygen levels. They test in the blue ridge mountains,at the rivers source,and

in Richmond Virginia,a highly populated area. What is the independent variable in this experiment?
Biology
2 answers:
iogann1982 [59]3 years ago
5 0

Answer: 21 holes

Explanation:

Yes

kykrilka [37]3 years ago
3 0
The oxygen levels I think
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