Question # 1

R-3 means.

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Less use

Reuse

Recycle

Refuse

The materials flow from one trophic level to the next by means of:

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Food chains

Food web

Both a & b

None of these

Abiotic component of the ecosystem is.

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Producers

Consumers

Decomposers

Light

A group of organisms, similar to one another, which can interbreed in nature and produce fertile off springs.

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Species

Genus

Family

Population

Nitrogen is an important component of:

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Proteins

Nucleic acid

Lipids

Both a and b

A relationship between two organisms in which individual of one species may kill and eat individuals of other species is called.

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Symbiosis

Competition

Predation

Mutualism

Conversion of urea and uric acid into Ammonia is called.

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Assimilation

Nitrogen fixation

Ammonification

Biological fixation

Identify the correctly matched pair.

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Rainfall-biotic factor in Ecosystem

Corn-secondary consumers

Global warming fossil fuel formating

Renewable natural resource air

In ecosystem the role of decomposers is played by

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animals

plants

bacteria and fungi

algae

All populations collectively are called:

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Species

Biome

Community

Ecosystem

Biospher surrounding the earth is about:

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17 km

18 km

19 km

20 km

During nitrogen fixation nitrogen is converted into:

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Nitrates

nitrates

ammonia

all to these

An example of carnivores plant is.

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Mosses

Ferns

Rose plant

Sundew

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