Question # 1

In Sindh, the desert ecosystem is called.

Choose an answer

Thar

Sahara

Gobi

thal

A pesticide is a chemical which destroys agricultural

Choose an answer

Pests

Competitors

Crops

Both a & b

Only 30% of the earth is dry land the remainder being covered with

Choose an answer

Water

Air

Trees

Grass

Fresh water ecosystem covers less than.

Choose an answer

1%

3%

5%

7%

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

Choose an answer

Acid rain

Basic rain

Heavy rain

Drizzling

What would be expected to happen if all the nitrogen-fixing organisms ceased to exist?

Choose an answer

There would be no significant change in number of animals

The total number of biomass would be reduced

All organisms would die out

The nitrogen level of the atmosphere would be increase

Each nuclear power station only can last for about

Choose an answer

10 years

20 years

30 years

40 years

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

Choose an answer

40 years

50 years

60 years

70 years

Northern coniferous forest are called.

Choose an answer

Alpine

Boreal

Taiqa

Prairles

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

Choose an answer

Heat energy

Kinetic energy

Electrical energy

Potential energy

Coniferous forest located at high latitude are called.

Choose an answer

Alpine

Boreal

Talga

Prairies

Ecosystem present on land or soil is called.

Choose an answer

Terrestrial

Atmosphere

Lithosphere

Both a and c

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

Choose an answer

Chlorofluorocarbon

Nitrogen

Chlorine

Carbon dioxide

The Macacamulatta isbiological name for

Choose an answer

Black bear

Cat

Rhesus monkey

Deer

Air is being polluted rapidly due to

Choose an answer

Industrialization

Automobiles

Sewage

Both a & b

A dominant plant of the deciduous forest is the

Choose an answer

Cactus

Acacia

euphorbia

Taxusbaccata

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

Choose an answer

Littoral zone

Profundal zone

Limnetic zone

Deseret

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

Choose an answer

Ecological niche

Ecological mutation

Succession

Genetic Drift

More Classes

Other Links

Biology Fsc Part 2 Chapter 12 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer