A tree unique to the tropical Monsoon climate is the?

A. fir

B. oil palm

C. teak

D. encalyptus

The fertility of the soil in a typical tropical rainforest is maintained by the?

A. abundant sunshine and rainfall

B. wide variety of animals

C. abundant supply of litter

D. relatively cool micro-climate

The main process of soil formation in the cool temperate continental grasslands of the world is?

A. calcification

B. salinization

C. ferrallitization

D. podzolization

E. no option indicated

The most critical cause of desertification in Nigeria is?

A. excessively high temperatures

B. extremely low rainfall

C. environment pollution

D. excessive pressure of land use

One of the soil- related problems of irrigation in the savannah region is increasing?

A. salinization

B. erosion

C. desiccation

D. exhaustion

The state of equilibrium reached by the vegetation of an area when it is left undisturbed for along period of time is called its?

A. climax

B. ecosystem

C. food chain

D. tropical level

One of the major environmental problem facing agriculture and forestry in North America, which can be attributed to modern industrial development is?

A. frost damage

B. water pollution

C. accellerated erosion

D. acid rain

A broad- based population structure implies a?

A. high level of industrial development

B. high dependency ratio

C. low growth rate

D. large economically active population

A major world population problem is that countries which have very large populations and very high population growth rates are generally those which?

A. posses very limited natural resources

B. suffer serious industrial population

C. are located in climatically marginal areas

D. are least able to provide for the population

The growth in population in a city is usually due to?

A. natural increase and emigration

B. immigration and natural increase

C. immigration and emigration

D. high birth rate and low death rate