Biology, asked by mzahidmehmoodminhas, 3 months ago

The oxygen concentration on surface of a river is:
(A) 1%
(B) 5%
(C) 10%
(D) More than 10 %

Answers

Answered by KDP100

0

Explanation:

More than 10%

Ans D is correct

Answered by mousam8673

0

Answer:

Option D is the answer

Explanation:

it is approximately 20.9%

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