Correct Answer: A. medium of exchange

Correct Answer: A. marble

Correct Answer: D. Hydrolysis

Correct Answer: A. Magistrate/District Court

Explanation

2(a) How agricultural production is affected by (i) Agricultural education and extension:

- Improved/better farm management decision making
- Improved procurement of farm inputs

- Access to marketing information and strategy

- Keeping of accurate farm records

- Acquisition of loans and their utilization

- Improve the farmers social disposition Help the farmers to understand and adopt modern farming techniques for improved productivity

- Agricultural education motivates the youths to take up farming as a profession

- Relay farmers' problems to the government ministries, research institutes and universities.

-Carry information from government ministries, universities and research institutes to farmers.

(ii) Environmental degradation:

- Desert encroachment exposes the soil to erosion

- Erosion renders the soil unproductive and unsuitable for agriculture

- Oil spillage pollutes the fishing and drinking water and kills all the aquatic life, thus reducing the profit of the fishermen

- Drinking water for the farm family and their animals is polluted; thus exposing them to health risks

- Air pollution by toxic fumes from industrial gases reduces the quality of air available to the farm family and their animals

- Acid rains from air pollution cause soil acidity and destruction of crops

- Deforestation exposes the soil to erosion agents

- Overgrazing causes erosion and hard pans Bush burning damages the physical structure of the soil and reduces soil fertility

- Air pollution reduces photosynthesis and thus reduces yield Plant population for livestock consumption is reduced

(b) Problems associated with communal land tenure system:

- Land cannot be pledged, sold or used as collateral by an individual

- Those with means, but who are not members of the community, find it difficult to get land for farming activities/non-indigenes of the community cannot acquire land or have access to it

- There is tendency to neglect parcels of useful land as no one readily considers it his/her interest to protect it from degradation.

- It is characterized by litigations and mis-understanding Mechanized farming cannot be practised without permission of the whole community.

- There is excessive land fragmentation over time - Allotted land can be revoked by new leadership

- It does not encourage planting of permanent crops.

(c) Components of an Incubator:

Setter/Egg tray

- Hatcher

- Thermostat

- Turner

- Felt tray

- Heat source

- Vent/fan/air circulation unit

- Hygrometer

- Alarms

- Insulators

- Control unit

- Thermometer.

(d) Storage structures for farm produce: (i) Yam tubers: Yam barn (ii) Cowpea Seeds: Silo - Rhumbus (iii) Fresh fish: Cold room/freezer.

Correct Answer: A. Architect

Correct Answer: B. Desdemona

Correct Answer: C. reveals the magnitude of the change between variables

Explanation

The concept of slope is important in economics because it is used to measure the rate at which changes are taking place. It shows how things change and about how one item changes in response to a change in another item

Explanation

(a)(i) Local craft industries produce on small scale (low output) while heavy manufacturing industries produce on large scale (mass production)

(ii) Local craft industries involve few people generally below ten people in the production process while heavy manufacturing industries involve many people

(iii) Simple tools which are normally not powered are used in local craft industries while heavy power-driven machines are used in heavy manufacturing industries

(iv) Local crafts are produced at home or in small workshops while heavy manufacturing industries take place in specially built factories

(v) Local craft industries require little investment whereas heavy manufacturing industries require a lot of capital

(vi) Local craft industries use mainly local raw materials while heavy manufacturing industries depend on both local and imported raw materials.

(vii) Local craft industries involve great skills and artistry but in heavy manufacturing industries, artistry is not necessary.

(b) Factors of location of an iron and steel industry in tropical Africa, e.g Ajaokuta, Kogi State, Nigeria

(i) Proximity to raw materials

(ii) Proximity to power

(iii) Supply of labour

(iv) Transport

(v) Market

(vi) Capital

(vi) Government policy

(vii) Availability of water

(c)(i) Raising of general standard of living

(ii) More foreign exchange from processed commodities

(iii) Transfer or technology

(iv) Development of infrastructure

(v) Provision of employment

(vi) Favourable balance of trade

(vii) Generation of revenue to the government through taxes and royalties

(viii) Expansion of local markets

(ix) Aiding industrial research.

Correct Answer: B. proximate cause