Question # 1

The total energy from the sun is happened by the producers in an ecosystem is about?

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20 %

10 %

5 %

1 %

As CFC_s rise to the atmosphere ultraviolet rays release

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Fluorine

Chlorine

Carbon

Hydrogen

Lavering is the characteristic of.

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Tundra

Desert

Grass land

Talga

In oceans especially in tropical regions temperature of surface water is about

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10^oC

15^oC

25^oC

35^oC

Mountain of Karakoram are located in major terrestrial ecosystem in Pakistan.

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Grass land

tundra

Coniferous alpine forest

Temperate deciduous forest

The biome, which has very fertile soil, rich in organic matter with maximum water holding capacity is.

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Alpine forest

Grassiland

Desert

Temperate deciduous forest

A natural process in which surface soil is removed by the action of water or wind is

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Corrosion

Attrition

Erosion

Weathering

Each nuclear power station only can last for about

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10 years

20 years

30 years

40 years

Air is being polluted rapidly due to

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Industrialization

Automobiles

Sewage

Both a & b

Perhaps the most fragile of all the biomes, because of its short growing season is.

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Tundra

Desert

Grass land

Temperate deciduous forest

The fossil fuels are

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Coal

Oil

Gas

All a,b and c

Which of the following is NOT recycled in ecosystem?

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Carbon

Sulphur

Energy

Water

The earth surface covered with water is

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35%

11%

21%

33%

A change in the community structure of an ecosystem over a period of time is:

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Ecological niche

Ecological mutation

Succession

Genetic Drift

Which of the following is the most fragile ecosystem.

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Grass land

Wood land

Tundra

Savanna

The decline in thickness of the ozone layer is caused by increasing level of

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Chlorofluorocarbon

Nitrogen

Chlorine

Carbon dioxide

Which statement defines the net primary production in an ecosystem over a given time period?

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The total amount of organic matter in the plants in excess of that used in respiration

The total amount of organic matter used in respiration by all the organisms present

The total amount of photosynthesis product from all plants

The total amount of organic matter in all organisms present

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Biology Fsc Part 2 Chapter 12 Online Test MCQs With Answers

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