A landform that may result mainly from wind erosion is?

A. barchan

B. seif dune

C. wadi

D. deflation hollow

In humid tropical regions, the major soil type is?

A. podzol

B. chernmozem

C. latosol

D. lithosol

Bush burning affects the atmosphere directly by ?

A. killing soil microbes

B. adding to carbon(IV) oxide accumulation

C. leaving the land surface bare

D. adding ashes to the soil

A process whereby a plant community is replaced by another is known as?

A. colonization

B. succession

C. competition

D. consolidation

The most visible form of soil erosion is?

A. wind erosion

B. splash erosion

C. sheet erosion

D. gully erosion

Softwood from coniferous forests is mainly used as raw material for the production of?

A. pulp and paper

B. animal feed and fibre

C. non-alcoholic beverages

D. poles and planks

In a soil profile, the C-horizon can be described as the?

A. topmost layer that may include organic litter

B. zone relatively unaffected by soil-forming processes

C. portion of the soil affected by leaching

D. zone of accumulation rich in bases and organic matter

One of the consequences of the polar ice-caps melting is the?

A. submergence of existing coast lands

B. emergence of submerged island

C. increase in global temperature

D. drier conditions in the tropical areas

The factor that best explains the large concentration of population in Java is?

A. fertile soils

B. large mineral deposits

C. nearness to the sea

D. industrial agglomeration

The most important characteristic of a population that enhances rapid economic development is the?

A. total size

B. level of education

C. age structure

D. sex ratio