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11.

Which of the following is not a reason of unnatural extinction of species?

A.	Environmental pollution	B.	Soil erosion
C.	Afforestation	D.	Increased urbanization

12.

On the basis of genetic diversity, the following are differentiated with in a species:

A.	Ecads	B.	Ecotypes
C.	Populations	D.	Communities

13.

The blue revolution refers to enhancement in the production of:

A.	Fishes	B.	Crabs
C.	Birds	D.	Mammals

14.

Reserpine is obtained from:

A.	Dioscorea	B.	Taxus
C.	Rauvolfia	D.	Papaver

15.

The approximate number of plant species, according to WCMC, that have become extinct in the last four centuries:

A.	834	B.	483
C.	533	D.	384

16.

Bio-diversity means:

A.	A contraction of biological diversity.	B.	The range of variation or differences among
C.	Some set of entities; biological diversity thus refers to variety within the living world	D.	All of the above

17.

The types of bio-diversity are:

A.	Genetic diversity	B.	Species diversity
C.	Ecosystem diversity	D.	All of the above

18.

The causes of loss of biological diversity are:

A.	Over hunting is perhaps the most obvious direct cause of extinction in animals, as it has affected several large and well-known species	B.	Genetic diversity as represented by genetic differences between discrete populations with wild species, is liable to reduction as result of the same factors affecting species
C.	A major, though at present largely unpredictable, change in natural environments is likely to occur within the next century as a result of large-scale changes in global climate and weather patterns	D.	All of the above

19.

Maintenance of Biological Diversity is:

A.	In-situ conservation	B.	Ex-situ conservation
C.	Why conserve biological diversity	D.	All of the above

20.

Biological diversity resources are:

A.	Food	B.	Pharmaceuticals
C.	Both (a) & (b)	D.	None of these