Explanation

(a) Significance of minerals as environmental resources include:

(i) It provides fuel, e.g petroleum, coal and natural gas

(ii) It provides foreign exchange

(iii) Provision of employment, i.e mining

(iv) Provision of basic amenities where mining is carried out

(v) Provision of raw materials for industries, e.g limestone for cement industries

(vi) Some are valuable minerals used in making necklace, wrist watches e.g gold.

(b) Three major problems resulting from the exploitation of mineral resources include:

(i) Environmental pollutions

(ii) Depletion off natural vegetation

(iii) Mining activities do lead to soil erosion

Correct Answer: A. Rhetoric

Correct Answer: D. flowchart

Explanation

The diagrammatic representation of an algorithm is a flowchart. A flowchart is a type of diagram that represents an algorithm, workflow or process, showing the steps as boxes of various kinds, and their order by connecting them with arrows.

Correct Answer: A. working capital

Explanation

(A) Transport is important to commerce in the following ways:

(i) Transport facilitates the movement of goods and persons.

(ii) It conveys raw materials and capital goods to production sites.

(iii) It increases the volume of trade by widening the markets for various products thereby leading to economic growth and development.

(iv) It facilitates import and export of goods and services.

(v) It influences the location of industries in a particular place.

(vi) It encourages specialization which results in more and cheaper goods, thus increasing the standard of living.

(B) The Advantages of Air Transport are:

(i) It is a fast method of transport.

(ii) The danger of damage to delicate fragile and perishable goods is reduced.

(iii) The cost of insurance of goods by air is reduced because of the shorter time the insurance company is at risk.

(iv) It is a more comfortable means of transport hence suitable for long journeys.

(v) Less handling is required for goods being transported by air/pilfering is reduced.

(vi) Markets are extended as distant markets are reached in matters of minutes or hours by air transport.

(vii) The rate of accident is minimal.

Disadvantages of Air Transport are:

(i) It is a very expensive method of transport/high cost of freight.

(ii) The speed of air transport is often offset by delays at the air terminals.

(iii) Weather conditions can severally upset air transport.

(iv) Flights are usually on fixed schedule, not flexible, which may not always suit the businessman.

(v) It is unsuitable for the transport of certain kinds of goods, e.g. heavy machinery.

(vi) Accidents, when they occur, are generally disastrous.

(vii) It requires trans-shipment/It does not provide door-to-door services.

(viii) it is capital intensive as much capital is needed to buy aircraft, build and maintain airports.

Correct Answer: D. mitochondrion

Correct Answer: A. homosexuality

Correct Answer: D) the speed of sound in them is very high

Explanation

(a) Small scale production involves small capital outlay and therefore results in low level of output. On the other hand, large scale production involves a large scale capital outlay and therefore results in high level of output.

(b)Some of the internal economies of large scale production are :

(i) technical economies: a large firm has the advantage in the use of factor inputs which results in lower cost per unit of output.

(ii)financial economies: a large scale producer can borrow money from financial institutions at lower interest rate because it can offer better collateral security.

(iii)marketing economies: a large firm can buy inputs in bulk and possibly at discounts. It can also pay less on transportation and advertisement which result in lower operating cost.

(iv)managerial economies: when output is increasing, managerial cost increases at a slower rate. Number of managerial staff may increase with output. OR As output increases, specialists can be employed to take charge of the various processes e.g. marketing.

(v) risk-bearing economies: a large firm is able to bear losses arising from its operations as it can provide insurance coverage. OR It can also diversify its product and its market.

(vi)welfare economies: a large firm can provide better conditions of service which may enhance the level of productivity and also attract highly qualified manpower.

(vii) research economies: a large firm can invest huge amount on research and thereby experience technical progress.

Correct Answer: A. Clifford Constitution

Explanation

Not available