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Category: Biosphere Mcqs

Which of the following gases is not found free in air?

January 26, 2020 BILAL KHATTAK0

A.Nitrogen
B.Hydrogen
C.Oxygen
D.Carbon dioxide

Nutrients are recycled in the atmosphere with the help of certain micro-organisms referred to:

January 3, 2020 BILAL KHATTAK0

A.Producers
B.Decomposers
C.Consumers
D.None of these

The most dangerous consequence of excessive deforestation is:

December 25, 2019 BILAL KHATTAK0

A.Soil erosion
B.Loss of forest wealth
C.Loss of many valuable plants
D.None of these

The study of relation of animals and plants to their surroundings is called:

November 18, 2019 BILAL KHATTAK0

A.Ecology
B.Ethnology
C.Genealogy
D.Iconology

The fain factor which determines the balance of nature is:

November 12, 2019 BILAL KHATTAK0

A.Human activities
B.Habit and habitat
C.Environmental pollution
D.Availability of food

Biodegradable wastes can usually be converted into useful substances with the help of:

November 3, 2019 BILAL KHATTAK0

A.Bacteria
B.Nuclear proteins
C.Radioactive substances
D.None of these

Nitrogen fixation is done by:

November 2, 2019 BILAL KHATTAK0

A.Red algae
B.Blue green algae
C.Brown algae
D.None of these

Which of the following terms is used for several individuals of a species living together in a locality?

October 22, 2019 BILAL KHATTAK0

A.Biosphere
B.Bio-community
C.Ecosystem
D.Population

The largest source of pollution in the world is:

October 20, 2019 BILAL KHATTAK0

A.Industrial effluents
B.Sewage and garbage
C.Automobile exhausts
D.Herbicides and insecticides

Uncontrolled industrialisation leads to acid rain. It is mainly contributed by:

October 9, 2019 BILAL KHATTAK0

A.Nitrous and sulphur oxide
B.Carbon dioxide
C.Methan gas
D.Chlorofluorocarbons


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