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In what two ways can the frog population be used to monitor the river's water quality?

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In what two ways can the frog population be used to monitor the river's water quality-example-1
User Roman SL
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2 Answers

9 votes
The answer is D and B
User Madison May
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9 votes

Answer:

I'm almost certain one of the answers is 'D'. Other than that, I believe the second answer is 'B'. Don't submit this yet, because some other people might have different opinions.

User Ceezy
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