Almost one third of the land area through out the world is affected by land degradation. Pakistan’s agriculture sector though facilitates employment to >65% but is facing challenges from:

A. Erosion
B. Salinity
C. Waterlogging
D. All of the above

The solid wastes generated in Pakistan are about: ___________?

A. 47,920 tonnes/day
B. 65, 772 tonnes/day
C. 12250 tonnes/day
D. All of the above

Potassium plays a significant role in the transport of water & nutrients through the plant in the xylem. When the supply of K is reduced, the transportation of ___________________ is depressed:

A. Nitrates, phosphates
B. Calcium, magnesium
C. Amino acids
D. All of the above

calcium is immobile in plants. Therefore, under conditions of deficiency, young tissue is affected first. calcium deficiency symptoms are:

A. Death of terminal buds; roots tips also affected
B. Abnormal dark green appearance of foliage
C. Premature shedding of  blossoms & buds & weakened stem
D. All of the above

Generally speaking, only level to nearly level (0-2 % slope) & gently sloping lands (2-5 % slope) should be:

A. Brought under range crops
B. Forests
C. Both a & b
D. None of the above

Absence Of Chlorophyll is known as _______?

A. Agoun
B. Albinism
C. Acrodsome
D. None of these

The force with which the particles of same body are held together is called_______________?

A. Cohesion
B. Adhesion
C. Surface tension
D. All are correct

Haustoria are produced ___________?

A. By fungi parasitising animal tissues
B. By hypha of obligate parasite
C. In artificial cultures
D. None of these

An ommatidium is best defined as a: __________?

A. Subdivision of the ventral nerve cord
B. Functional unit of the compound eye
C. Mechanoreceptor used for proprioception
D. Ventral lobe of the insect’s brain

Fly larvae (maggots) move away from a bright source of light. This is an example of a ___________?

A. Taxis
B. Reflex (involuntary movement)
C. Kinesis
D. Transverse orientation (keeping a fix angle on a distance)