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when domestic sewage mixes with wate...

when domestic sewage mixes with water ,

A

small animals such as rats will die after drinking river water

B

the increased micorobial activity relases micronutrients such as iron

C

the increased microbial actvity uses up dissolved oxygen

D

the river water is still suitable for drinking as impuphorus are only about 0.1%

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The correct Answer is:
C
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CENGAGE BIOLOGY-MICROBES IN HUMAN WELFARE-ARCHIVES
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  3. when domestic sewage mixes with water ,

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  6. Which one of the following is an example of carrying out biological co...

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  7. Maximum nutritional diversity is found in the rice fields is

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  8. A nitrogen fixing microbe associated with Azolla in rice-fields is:-

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  9. Yeast is used in the production of:-

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  10. Which one of the following helps in absorption of phosphorus from soil...

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  11. A patient brought to a hospital with myocardial infraction is normally...

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  12. Monascus purpureus is a yeast ued commercially in the production of

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  13. Green revolution in India occurred during

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  14. In gobar gas, the maximum amouts is that of Or Biogas produced thr...

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  15. Domestic sewage of large cities

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  16. During sewage treatment, biogases are produced which includes :

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  17. A good producer of citric acid is :

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  18. What gases are produced in anaerobic sludge digestres

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