191.
Measuring Biochemical Oxygen Demand (BOD) is a method used for :
A
estimating the amount of organic matter in sewage water
B
working out the efficiency of oil driven automobile engines
C
measuring the activity of Saccharomyces cerevisae in producing curd on a commercial scale
D
working out the efficiency of RBCs about their capacity to carry oxygen
Answer :
estimating the amount of organic matter in sewage water
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
192.
Which one of the following pairs is mismatched?
A
Fossil fuel burning - release of $$CO_2$$
B
Nuclear power - radioactive wastes
C
Solar energy - green house effect
D
Biomass burning - release of $$CO_2$$
Answer :
Solar energy - green house effect
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
193.
Increase in BOD of water reservoir is due to
A
Algae
B
Soil
C
Moss
D
Waste product
Answer :
Waste product
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
194.
Which of the following is considered a hot spot - of biodiversity in India
A
Eastern Ghats
B
Aravali Hills
C
Western Ghats
D
Indo-Gangetic-Plain
Answer :
Western Ghats
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
195.
Maximum bioconcentration of pesticide residues is usually found in birds that exclusively feed on
A
fish
B
seeds
C
worms
D
meat
Answer :
fish
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
196.
Trophic levels are formed by
A
Only plants
B
Only carnivores
C
Only animals
D
Organisms linked in food chain
Answer :
Organisms linked in food chain
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
197.
Which of the following is the main factor of desertification?
A
Tourism
B
Irrigated agriculture
C
Over- grazing
D
All of these
Answer :
Over- grazing
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
198.
The pyramid of energy in a forest ecosystem is
A
Always upright
B
Always inverted
C
Both upright and inverted
D
None of the above
Answer :
Always upright
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
199.
Pollution is not caused by
A
Thermal power plant
B
Automobile
C
Radioactive power plant
D
Hydroelectric power plant
Answer :
Hydroelectric power plant
Discuss Question
No explanation is given for this question. Let's discuss the answer together.
200.
Large ecosytems are called
A
Biomes
B
Ecotone
C
Ecads
D
Biocoenosis
Answer :
Biomes
Discuss Question
No explanation is given for this question. Let's discuss the answer together.