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What is the correct answer?

4

All the living organisms on earth constitute

A. biome

B. biosphere

C. community

D. population

Correct Answer :

B. biosphere


Related Questions

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Some animals have a constant high body temperature. This is because

A. they like this temperature

B. they can work fast in the temperature

C. they prefer to live in cold region

D. they are active animals

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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

All the living organisms on earth constitute

A. biome

B. biosphere

C. community

D. population

What is the correct answer?

4

Ultra-violet radiation from sunlight causes the reaction that produce

A. CO    

B. so2

C. o3

D.
 Fluorides

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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 most widespread form of symbiosis in nature is

A. mutualism

B. commensalism

C. predatism

D. parasitism

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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

Synecology is the study of

A. community in relation to environment

B. individuals

C. environment

D. water

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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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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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4

Silent valley of Kerala is preserved because

A. it contains timber trees

B. it harbours lions

C. it harbours elephants

D. it contains rare animals and plants

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Plants growing on sea shores show characters of

A. hydrophytes

B. mesophytes

C. xerophytes

D. halophytes

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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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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

Gas liberated in Bhopal gas tragedy was

A. methyl isocyanide

B. phenyl isocyanide

C. ethylene

D. acetylene

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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

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Biome is

A. a part of the earth and its atmosphere which inhabits livings organisms

B. a community of organisms interacting with each other

C. the fauna and flora on land

D. the fauna and flora on ocean

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The energy storage of consumer level is called

A. gross primary productivity

B. net primary productivity

C. secondary productivity

D. none of these

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In an ecosystem the population of

A. primary producers is larger than that of primary consumers

B. secondary consumers is the largest because they are most powerful

C. primary consumers is the least dependent upon primary producers.

D. primary consumers outnumber primary producers

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Synecology is the study of

A. environment

B. individual

C. specific species

D. plant community

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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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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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Pedology is the study of

A. soil

B. rocks

C. animal diseases

D. locomotion of animals

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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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The main cause of soil erosion in India is

A. drought

B. heavy rainfall

C. deforestation

D. heavy winds

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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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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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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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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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One always finds many more of the prey species than of the predator. This is called a

A. food web

B. pyramid of numbers

C. pyramid of succession

D. none of these