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31.

Identify the correctly matched pair:

A.	Montreal Protocol - Global warming	B.	Ramsar Convention - Ground water pollution
C.	Kyoto Protocol - Climatic change	D.	Basal Convention - Biodiversity Conservation

32.

What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer?

A.	Sulphur di-oxide	B.	Carbon di-oxide
C.	Nitrogen oxides and fluoro-carbons	D.	Carbon monoxide

33.

The maximum biological magnification of DDT through food web is seen in:

A.	Algae	B.	Bacteria
C.	Higher plants	D.	Man

34.

Spraying of DDT on crop produces pollution of:

A.	Air only	B.	Air and soil only
C.	Air, soil and water	D.	Air and water only

35.

DDT is a:

A.	Biodegradable pollutant	B.	Green house gas
C.	Non-degradable pollutant	D.	None of the above

36.

Exposure of plants to high fluoride concentration results in necrosis or chlorosis characteristics in:

A.	Petiole but not in lamina	B.	Only mid rib of lamina
C.	Leaf tip and leaf margin	D.	Stems tips only

37.

Ozone depletion in stratosphere shall result in:

A.	Forest fires	B.	Green house effect
C.	Global warming	D.	Increased incidence of skin cancer

38.

Most outstanding danger at present for the survival of living beings on earth is:

A.	Radiation hazard	B.	Desertification
C.	Deforestation	D.	Gleization

39.

The major cause of pollution is:

A.	Man	B.	Plants
C.	Animals	D.	Man and animals

40.

Which plant has become a troublesome weed in agricultural fields?

A.	Cyperus rotundus	B.	Eichhornia creassipes
C.	Parthenium hysterophorus	D.	Chenopodium album