Entry Test MCQ :: Man and His Environment

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21.

In 1947 population of Pakistan was

A.	32.5 million	B.	35.5 million
C.	40.5 million	D.	45.5 million

22.

Rate of population growth in 1980s was

A.	10%	B.	1%
C.	2%	D.	15%

23.

Replantation of plants in the areas where they were present earlier is called

A.	Deforestation	B.	Aforestation
C.	Forestation	D.	Reforestation

24.

Establishment of new forests where no forests existed previously is called

A.	Reforestation	B.	Forestation
C.	Neofrestation	D.	Aforestation

25.

Which is environmental buffer?

A.	Mountains	B.	Deserts
C.	Forests	D.	Oceans

26.

About half of the rain which falls in tropical forests comes from

A.	High winds	B.	Cold surroundings
C.	Transpiration of plants	D.	Surrounding seas

27.

Biodiversity is

A.	Total number of species in a community	B.	Total number of species in an ecosystem
C.	Total number of genus in an ecosystem	D.	None of these

28.

Which statement is not true about ozone?

A.	Bluish	B.	Explosive
C.	10-50 km	D.	O2

29.

Ozone depletion is commonly caused by

A.	CFCs	B.	Industrial smoke
C.	Heavy nitrogen gasses	D.	Carbon dioxide

30.

Diseases caused by UV rays in humans

A.	Skin cancers	B.	Cataracts
C.	Night blindness	D.	Both a and b