Carrying capacity is a balance between _______.

A. Vegetation and animals
B. By an expression of animals density
C. Both (a) & (b)
D. None of these

Ozone layer in stratosphere is effected by:

A. Excess CO2
B. Excess CO
C. Chloro-fluoro-carbon
D. Low rainfall

Effect of the tree in pruning is:

A. The contrary, properly conducted pruning is not harmful to the tree
B. Careless pruning can, however, cause injury to the bole, leaving wounds extending through the bark into the cambium and even to the wood
C. Both (a) & (b)
D. None of these

BOD of polluted water is increased by

A. Algae
B. Moss
C. Ferns
D. Distillated wastes

National forest policy for Pakistan means:

A. Pakistan mainstary is agriculture which is dependent on canal irrigation. Sound management of watersheds should, therefore, constitute the basic objective of forest policy
B. Because of inadequate forest resources Pakistan must concentrate on developing new plantations.
C. Both (a) & (b)
D. None of these

The woodland stage in a hydrosphere has predominance of plants like:

A. Eleocharis, Fimbristylis
B. Salix, Populus
C. Ranunculus, Polygonum
D. Acer, Ulmus

Land utilization – the country occupies an area of ____ million ha.

A. 87.98
B. 90.98
C. 92.99
D. None of these

Air pollution effects are usually found on:

A. Leaves
B. Flowers
C. Stems
D. Roots

______ level training is imparted to the nominees from the provinces and foreign countries:

A. F.F.I. 2 years M.SC.
B. B.Sc.
C. Both (a) & (b)
D. None of these

The major drawback of DDT as a pesticide is that:

A. Its cost of production is high
B. It is not rapidly degraded in nature
C. Organisms at once developed resistance to it
D. It is significantly less effective than other pesticides