|
Mention the cause of thinning of ozone layer
|
|
0
|
574
|
September 3, 2016
|
|
Write the unit used for measuring ozone thickness
|
|
0
|
1007
|
September 3, 2016
|
|
State the purpose of signing the Monsltreal Protocol
|
|
0
|
417
|
September 3, 2016
|
|
Name the Green House gases that contribute to total global warming
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|
0
|
521
|
September 3, 2016
|
|
Why are catalytic converters recommended for vehicles?
|
|
1
|
3029
|
September 3, 2016
|
|
How does an electrostatic precipitator work to remove particulate pollutant released from the thermal power plants?
|
|
0
|
1738
|
September 3, 2016
|
|
Mention the major causes of air pollution in metro cities. Write any three ways by which it can be reduced
|
|
0
|
2493
|
September 3, 2016
|
|
Mention how e-waste is produced and disposed off.Write the solutions for its treatment
|
|
0
|
2108
|
September 3, 2016
|
|
State the function of catalytic converter in an automobile
|
|
0
|
1951
|
September 3, 2016
|
|
What is polyblend?Why did the plastic manufacturers think of producing it ? Write its usefulness
|
|
0
|
3740
|
September 3, 2016
|
|
How did Ahmed Khan, plastic sacks manufacturer from Bangalore, solve the ever-increasing problem of accumulating plastic waster?
|
|
0
|
776
|
September 3, 2016
|
|
Name any two sources of e-wastes and write two different ways for their disposal
|
|
0
|
2318
|
September 3, 2016
|
|
Mention information that the health workers derive by measuring BOD of a water body
|
|
0
|
1580
|
September 3, 2016
|
|
Why is sewage water treated until the BOD is reduced ? Give a reason
|
|
0
|
4509
|
September 3, 2016
|
|
How do algal blooms affect the life in water bodies?
|
|
0
|
1545
|
September 3, 2016
|
|
Why should motor vehicles equipped with catalytic convertors use unleaded petrol?
|
|
0
|
482
|
September 3, 2016
|
|
Inspite of being non-polluting why are there great apprehensions in using nuclear energy for generating electricity?
|
|
0
|
835
|
September 3, 2016
|
|
State the cause of Accelerate Eutrophication
|
|
0
|
740
|
September 3, 2016
|
|
Explain the birth rate and death rate in population with the help of an example
|
|
1
|
3954
|
September 3, 2016
|
|
Draw and explain a logistic curve for a population of density at time whose intrincic rate of natural increase is and carrying capacity is k
|
|
0
|
3895
|
September 3, 2016
|
|
Write the parasitic adaptations the parasites have evolved in accordance with their lifestyles
|
|
1
|
2530
|
September 3, 2016
|
|
Study the graph give below and answer the question that follow :
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|
1
|
1071
|
September 3, 2016
|
|
Why do clown fish and sea anemone pair up ? What is this relationship called?
|
|
0
|
1953
|
September 3, 2016
|
|
Explain brood parasitism with the help of an example
|
|
0
|
887
|
September 3, 2016
|
|
How does Monarch butterfly defend itself from predators ? Explain
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|
0
|
3333
|
September 3, 2016
|
|
Construct an age pyramid which reflects an expanding growth status of human population
|
|
0
|
2755
|
September 3, 2016
|
|
Apart from being part of the food chain, predators play other important roles.Mention any two such roles supported by examples
|
|
0
|
1203
|
September 3, 2016
|
|
Describe the mutual relationship between fig tree and wasp and comment on the phenomenon that operates in their relationship
|
|
0
|
816
|
September 3, 2016
|
|
Explain Verhulst - Pearl Logistic Growth of a population
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|
0
|
4851
|
September 3, 2016
|
|
Differentiate between commensalism and mutualism by taking one example each from plants only
|
|
0
|
2863
|
September 3, 2016
|