Question # 1

Northern coniferous forest are called.

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Alpine

Boreal

Taiqa

Prairles

Modern man is called

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Homo erectus

Homo habilis

Homo sapiens

Homo neanderthalensis

Each nuclear power station only can last for about

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10 years

20 years

30 years

40 years

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

Cacti and Euphorbia are the desert plants which store water in their.

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Fleshy leaves

Freshy stems

Freshy roots

Freshy buds

The causes of green house effect are:

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Over urbanization

Deforestation

Industrialization

All of them

Oxone molecule is made up by binding of three atoms of

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Nitrogen

Oxygen

Hydrogen

Carbon

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

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Forest

Savanna

Grass land

Desert

The average rain fall in temperate deciduous forest is between

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600-1500 mm

650 -1500 mm

750-1500 mm

700 -1500 mm

At the time of independence in 1947 the population of pakistan was

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10 m

20 m

25.7 m

32.5 m

Here, light is insufficient to support photosynthesis.

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Littoral zone

Profundal zone

Limetic zone

Photoplankton zone

Ecosystem present on land or soil is called.

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Terrestrial

Atmosphere

Lithosphere

Both a and c

In succesion lithoseres takes place on:

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Sand

Water

Forest floor

Bare rocks

The zone, rich in life, in a fresh water lake is called.

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Littoral zone

Profundal zone

Limnetic zone

Deseret

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

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

Coniferous forest located at high latitude are called.

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Alpine

Boreal

Talga

Prairies

Temperate deciduous forest are located in Pakistan at.

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Chilas

Mian wali

Shogran

Sindh

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