Question # 1

Half of the increase in atmospheric carbon dioxide concentrations in the last.............. years has occured since 1980

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100

200

300

400

Consumers that actively hunt other organism are called.

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Prey

Competitor

Predator

Symbiont

The feeding level of an organism in an ecosystem is called.

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Food Web

Food chain

Trophical level

Secession level

The organisms upon whihc a redator feeds are called.

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Prey

Carnivores

Herbivores

Producers

Which factor is responsible for ecological imbalance.

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Over hunting

Change in water supply

Migration

All these

A symbiotic relationship in whihc both speciesl get benefit is called.

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Commensalism

Hebitate

Mutualism

Symbiosis

Th graphical epresentation of tropihic relationship oforaganisms in an ecosystem is called.

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Food Chian

Ecological pyramid

Trophic level

Predation

--------occupy the b ase of pyramid.

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Producers

Primary canivores

Herbivores

Top carnivores

A relationship where two species live together closely is called

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Symbiosis

Predation

Competitor

None of these

------------- gas is released when dead organisms are decomposed by the decomposers.

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Oxygen

Carbon dioxide

Nitrogen

Hydrogen

A relationship where two species live togetehr closely is called.

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Mutualism

Commensalism

Symbiosis

Hebitate

A food chain starts from the..........

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Primary carnivores

Herbivores

Producers

Top carnivores

The poisonous and harmsful substances which make the air unfavorable for life are called.

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Solid pollutant

Air pollutant

Water pollutant

Acid Rain

Which is the solution of environmental problems.

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Reducing pollution

Plantation

Protection of endangered

All these

Ozone is a layer of gases in ............. atmosphere of the Earth.

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Upper

Lower

Middle

Inner

Carbon cycle and ............. cycle are teh processes in whihc these minerals circulate between the organisms and the environment.

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Hydrogen

Iodine

Oxygen

Nitrogen

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