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Biology Fsc Part 2 Chapter 12 Online Test MCQs With Answers

Question # 1

A form of air pollution in which airbone acids produced by electric utility plants and other sources fall to Earth in distant regions is

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Acid rain

Basic rain

Heavy rain

Drizzling

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Question # 2

Lavering is the characteristic of.

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Tundra

Desert

Grass land

Talga

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Question # 3

Which one is not desert.

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Thar

Thal

Sahara

Talga

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Question # 4

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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Question # 5

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

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10^oC

15^oC

25^oC

35^oC

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Question # 6

The best way to increase food production from ecosystem view point is:

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To increase cultivable land by clearing forest

Use of excessive fertilizers

Use of high quality pesticides

Use of genetically improved varieties of seeds

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Question # 7

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

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Question # 8

In which type of ecosystem in the smallest fraction of nutrients present in soil.

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Forest

Savanna

Grass land

Desert

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Question # 9

What will be the age of willow tree 10 centimeter long and 70 centimeter in diameter

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40 years

50 years

60 years

70 years

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