A) measuring oxygen levels in blood
B) computing oxygen levels in forest ecosystems
C) pollution assay in aquatic ecosystems
D) assessing oxygen levels in high altitude regions
Correct Answer: C
Solution :
[c] It is the amount of dissolved oxygen needed (i.e., demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.You need to login to perform this action.
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