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4

Which is the correct sequence in a food-chain

A. Grass > Wolf �Deer -^Buffalo

B. Grass � Snake �Insect �Deer

C. Grass -�Insect >Birds >Snake

D. Bacteria ->Grass ~>Rabbit -�Wolf

Correct Answer :

D. Bacteria ->Grass ~>Rabbit -�Wolf


Related Questions

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4

Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi

A.
 Fly ash    

B. so2

C.  Hydrocarbon gases

D. CO

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4

Pedology is the study of

A. soil

B. rocks

C. animal diseases

D. locomotion of animals

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In a food-chain, the saprophytic organisms are

A. producers

B. consumers

C. predators

D. decomposers

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A pond is

A. a biome

B. a natural ecosystem

C. an artificial ecosystem

D. a community of plants and animals

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Trophic levels are formed by

A. plants only

B. animals only

C. carnivorous animals only

D. organisms linked in food-chains

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The total set of feeding relationships in a biotic community is called

A. a food chain

B. trophic levels

C. food webs

D. ecosystem

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Which of the following is normally not an important atmospheric pollutant

A.  CO    

B. co2

C. so2

D. Hydro-carbon

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Synecology is the study of

A. community in relation to environment

B. individuals

C. environment

D. water

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When compared to the trophic level above, the total energy present in any given trophic level is necessarily

A. greater

B. lesser

C. the same

D. very small

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An association between two or more species in which both are benefited is known as

A. commensalism

B. symbiosis

C. mutualism

D. cooperation

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Bio tic factors are

A. chemical factors of soil which affect life

B. physical factors of soil which affect life

C. all living organisms which influence other organisms

D. factors of atmosphere which affect life

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4

Which of the following is an anti-forest conservation activity ?

A. Economy in timbering

B. Clear falling of trees

C. Prevention of fibres

D. Preservation of wild animals

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4

Association of a sea-anemone with hermit crab living in a gastropod shell is an example of

A. mutualism

B. commensalism

C. symbiosis

D. parasitism

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4

Animals which live at the bottom of the sea are called

A. leutic

B. benthic

C. pelagic

D. none of these

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An organism which lives at the expense of another organism is called

A. predator

B. prey

C. host

D. parasite

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The first fish that eats upon the planktonic form is

A. carnivore

B. primary consumer

C. secondary consumer

D. decomposers

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4

Ultra-violet radiation from sunlight causes the reaction that produce

A. CO    

B. so2

C. o3

D.
 Fluorides

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4

The source of energy in an ecosystem is

A. light received from sun

B. heat liberated during respiration

C. heat liberated during fermentation

D. none of these

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Birth rate under ideal conditions is known as

A. mortality

B. natality

C. both and

D. none of these

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Species that occur in different geographical regions separated by special barriers are

A. Allopatric

B. Autogenic

C. Sympatric

D. Allogenic

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Smog is a combination of

A. air and water

B. water and smoke

C. smoke and fog

D. fire and water

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Biological equilibrium is equilibrium among the

A. producers

B. producers and consumers

C. decomposers and producers

D. producers, consumers and decomposers

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4

The total interacting animals and plants in any well defined area which as field or a pond is known as

A. biosphere

B. biome

C. community

D. ecosystem

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The whale is

A. primary producer

B. carnivorous secondary consumer

C. herbivorous

D. a decomposers

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4

When a big fish eats a small fish, which eats water fleas supported by phyto-plankton, the water-fleas are

A. producers

B. primary consumers

C. secondary consumers

D. top consumers in the food-chain

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4

Soil particles are arranged in order of increasing size are

A. sand, silt and clay

B. silt, sand and clay

C. clay, sand and silt

D. clay, silt and sand

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4

Acid rain is

A. limited to industrial areas

B. presence of large quantity of SO^2 in the atmosphere

C. a natural phenomenon

D. presence of CO^2 in the atmosphere

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4

Plants growing on sea shores show characters of

A. hydrophytes

B. mesophytes

C. xerophytes

D. halophytes

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A food-chain consists of

A. producer only

B. producers and consumers

C. consumers only

D. decomposers only

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4

Which is the correct sequence in a food-chain

A. Grass > Wolf �Deer -^Buffalo

B. Grass � Snake �Insect �Deer

C. Grass -�Insect >Birds >Snake

D. Bacteria ->Grass ~>Rabbit -�Wolf