Question # 1

The percentage of carbon dioxide in Air is:

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40%

0.4%

0.04%

33%

Teh total number of persons living in an area is called.

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Species

Population

Community

habitat

Water pollution can cause.

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Cholera

Typhoid

Cancer

Both a and b

Water polythene bags can cause.

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Cholera

Choking of drains

Cancer

Typhoid

The total number of people living together in an area at a particular time is called

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special

population

community

habitat

Where the ozone make a protective layer?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Meat and eggs are rich in

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carbohydrates

proteins

glucose

vitamin

The percentage of oxygen in Air is

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78%

21%

0.04%

33%

Smog can cause.

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Eye diseases

Lung diseases

Cancer

Typhoid

The main causes of depletion of ozone layer is

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oxygen

hydrogen

chlorofluorocarbon

hydrocarbon

The coldest layer of the atmosphere

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Troposphere

Stratosphere

Mesosphere

Thermosphere

The height of Stratosphere form sea level is.

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50 km

55 km

60 km

45 km

Ultra violet radiations can cause.

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Cancer

Eye disease

None

Both a and b

About ........... percent population of Pakistan is dependent upon agriculture.

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90%

80%

60%

50%

---- types of fishes are found in Pakistan.

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700

600

800

650

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