Which one of the following statements is correct?
Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies
Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil.
Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil.
A.
Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies
Eutrophication is caused by run off water from fertilized fields suburban lawns, feed lots and detergent rich sewage. It is phenomenon of nutrient enrichment of a water body.
Quercus species are the dominant component in
temperature deciduous forests
alpine forests
scrub forests
tropical rain forests
In a coal-fired power plant, electrostatic precipitators are installed to control emission of
SO2
NOX
SPM
SPM
In which one of the following the BOD (Biochemical Oxygen Demand ) of sewage (s), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
SE < S < PE < DE
SE < PE < S < DE
PE < S < SE < DE
PE < S < SE < DE
Which one of the following is being utilised as a source of biodiesel in the Indian countryside?
betroot
sugarcane
pongamia
pongamia
