(a) Name four components of the ecosystem

(b) How does the carbon cycle explain the inter-dependence of the components in the ecosystem?

Subsistence farming is practiced when people

• A. grow crops for consumption
• B. grow only one crop
• C. export only one crop
• D. grow many crops for export

Two types of landscapes associated with highland areas in Nigeria are?

• A. inselberg and volcanic landscapes
• B. inselberg and deltaic landscape
• C. volcanic and alluvial landscapes
• D. lateritic and deltaic lanscapes

''The climate is characterised by an alternate hot, rainly season and cool, dry season. The vegetation consists mostly of tall grass and short trees which are mostly deciduous''The climate being described is the

• A. savanna
• B. cool temperate (British type)
• C. warm temperate (China type)
• D. tropical monsoon

The best way to prevent a watershed from degration is through?

• A. forest reservation
• B. inter-basin transfer
• C. fuelwood extraction
• D. crop production

Basalt differs from granite because it

• A. does not contain fossils
• B. is crystalline in structure
• C. is richer in iron and magnesium oxides
• D. is an igneous rock

Some of the solid minerals found in Nigeria are?

• A. marble tin and columbite
• B. tin, iron and diamond
• C. tin, diamond and bauxite
• D. uranium, lead and iron ore

The concentration of industries in urban centres of developing countries is due to all the following except

• A. high demand
• B. availability of labour
• C. location of raw materials
• D. presence ofinfrastructural facilities

Shiroro is located in

• A. Cameroon
• B. Kenya
• C. Ghana
• D. Nigeria

A common feature of the lakes marked F,G,H is that they are

• A. Used for HEP
• B. Located very close to the equator
• C. Located within the East African Rift Valley
• D. Very shallow