Quercus species are the dominant component in
temperature deciduous forests
alpine forests
scrub forests
tropical rain forests
A.
temperature deciduous forests
Temperate deciduous forests grow in continental climates with summer rainfall and severe winters. They are dominated by broad-leaved deciduous trees like Quercus Virginiana, magnolias, boys and allies as well as such tropical species as Ficus aurea, Lysiloma, Tropical rainforests occupy low altitude zones near the equator where annual rainfall exceeds 80 inch and 90 inch distributed over the year. Thress generally from three storeys scattered very tall emergent trees. Canopy layer and under storey stratum.
Tropical scrub forests develop in areas where moisture relations are intermediate between desert and savanna on one hand and rainforest on other.
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.
Which one of the following is not a bioindicator of water pollution?
Sludge-worms
Blood-worms
Stone files
Stone files
In a coal-fired power plant, electrostatic precipitators are installed to control emission of
SO2
NOX
SPM
SPM
Which one of the following is being utilised as a source of biodiesel in the Indian countryside?
betroot
sugarcane
pongamia
pongamia
According to central pollution control Board (CPCB), which particulate size in diameter (n micrometres) of the air pollutants is responsible for greatest harm to human health?
2.5 or less
1.5 or less
1.0 or less
1.0 or less
Which one of the flowing is the correct percentage of the two (out of the total of 4 ) green-house gases that contribute to the total global warming?
CFC 14%, CH4 20%
CO2 40% CFCs 30%
N2O 6%, CO2 86%
N2O 6%, CO2 86%
World summit on sustainable development (2002) was held in
Brazil
Sweden
Argentina
Argentina
Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year
1986
1987
1988
1988
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
