Question # 1

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

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

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

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Littoral zone

Profundal zone

Limnetic zone

Deseret

Air is being polluted rapidly due to

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Industrialization

Automobiles

Sewage

Both a & b

Rain that falls on high areas such as mountains possesses large amount of garvitational

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Heat energy

Kinetic energy

Electrical energy

Potential energy

The causes of green house effect are:

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Over urbanization

Deforestation

Industrialization

All of them

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

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Fleshy leaves

Freshy stems

Freshy roots

Freshy buds

Oxone molecule is made up by binding of three atoms of

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Nitrogen

Oxygen

Hydrogen

Carbon

A dominant plant of the deciduous forest is the

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Cactus

Acacia

euphorbia

Taxusbaccata

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

The fossil fuels are

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Coal

Oil

Gas

All a,b and c

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

Here, light is insufficient to support photosynthesis.

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Littoral zone

Profundal zone

Limetic zone

Photoplankton zone

a succulent plant has water stored in tissue.

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Cacti

Moss

Yarrow

Spruce

In succesion lithoseres takes place on:

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Sand

Water

Forest floor

Bare rocks

Limetic phytoplankton include the.

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Bacteria

Cyanobacteria

Fishes

Mouses

Chilas has major terrestrial ecosystem.

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Deciduous forest

Alpine Forest

Grass land

Tundra

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