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Question 5001Question →

In a mixed economic system, the price mechanism regulates the allocation of resources in the private sector, while government intervention is utilized to correct market failures and provide public goods.

True

False

Show answer & explanation

Answer: True

Answer

The statement is True. A mixed economy integrates both private enterprise operating through the price mechanism and state intervention to manage market failures and supply public goods.

A mixed economy fundamentally blends features of both free market capitalism and command socialism. The private sector relies on market forces and the price mechanism for resource allocation, while the public sector intervenes to address externalities, prevent exploitation, and ensure the provision of public goods.

Step-by-Step Solution

Analyze the function of the private sector in a mixed economy.

The private sector operates primarily via market demand, supply, and the price mechanism to determine resource allocation for consumer goods.

Profit motives drive private producers to respond to consumer preferences indicated by price signals.

Analyze the function of the public sector in a mixed economy.

The government steps in to provide non-excludable public goods, enforce laws, and correct market failures.

The price mechanism alone fails to allocate resources efficiently for public and merit goods.

Synthesize the dual framework of a mixed economy.

Combining price mechanism mechanisms with government regulation defines the core structural feature of a mixed economic system.

This dual approach balances economic efficiency with social welfare.

Key Concept

Dual Resource Allocation in a Mixed Economy

Question 5002Question →

When the price of Good X rises, a consumer experiences a substitution effect that reduces consumption of Good X by 6 units, and an income effect that increases consumption of Good X by 2 units. Which of the following statements correctly classifies Good X and describes the overall change in its quantity demanded?

Good X is an inferior good, and total quantity demanded decreases by 4 units.

Good X is a Giffen good, and total quantity demanded increases by 4 units.

Good X is a normal good, and total quantity demanded decreases by 8 units.

Good X is an inferior good, and total quantity demanded increases by 8 units.

Show answer & explanation

Answer: Good X is an inferior good, and total quantity demanded decreases by 4 units.

Answer

Good X is an inferior good, and total quantity demanded decreases by 4 units.

The correct response accurately applies the price effect identity (Total Effect = Substitution Effect + Income Effect). When the price of Good X rises, real income declines. A positive reaction in consumption (+2 units) from a fall in real income characterizes an inferior good. Combining the negative substitution effect (-6 units) and positive income effect (+2 units) yields a net reduction of 4 units in quantity demanded.

Step-by-Step Solution

Determine the type of good based on the income effect direction

Real income decreases when price increases. Since the income effect causes consumption of Good X to increase (+2 units) when real income drops, Good X must be an inferior good.

By definition, an inferior good has an inverse relationship between real income and quantity demanded.

Calculate the total price effect

Total Effect = Substitution Effect + Income Effect = -6 + 2 = -4 units.

The total change in quantity demanded is the algebraic sum of the substitution effect and the income effect.

Determine if the good is a Giffen good

Since the substitution effect (-6) outweighs the income effect (+2), total quantity demanded falls by 4 units. Thus, it obeys the law of demand and is not a Giffen good.

A Giffen good is a special inferior good where the income effect exceeds the substitution effect.

Key Concept

Decomposition of Price Effect into Income and Substitution Effects

Question 5003Question →

Match each function or characteristic of money listed on the left with its correct economic description on the right.

Click a left item, then click its matching right item

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Answer

Medium of Exchange matches with overcoming the double coincidence of wants; Unit of Account matches with providing a common denominator for value measurement; Standard of Deferred Payment matches with facilitating credit transactions and future debt settlement; Divisibility matches with enabling division into smaller units for micro-transactions.

Each item correctly pairs a core economic property or function with its precise definition. Medium of Exchange solves the double coincidence of wants issue inherent in barter trade. Unit of Account offers a uniform metric for pricing commodities. Standard of Deferred Payment permits future financial settlements. Divisibility ensures money can be divided into smaller denominations.

Step-by-Step Solution

Identify the primary functions of money.

Medium of Exchange facilitates current trade and eliminates double coincidence of wants; Unit of Account sets standard prices.

Primary functions are fundamental roles money serves in any monetary system.

Identify the secondary functions of money.

Standard of Deferred Payment allows present economic contracts to be settled in future monetary units.

Secondary functions arise directly out of the primary functions.

Identify physical characteristics of money.

Divisibility ensures money can be split into smaller fractions for transactions of different magnitudes.

Without divisibility, change cannot be given and small transactions become impossible.

Key Concept

Functions and Characteristics of Money

Question 5004Question →

In a command economic system, state authorities frequently encounter persistent shortages of consumer goods despite direct ownership of productive resources. Which factor primarily accounts for this structural inefficiency?

Central planning bodies lack dynamic market price signals required to calculate consumer preferences and allocate resources efficiently.

The price mechanism automatically adjusts resource distribution according to state-mandated production targets.

Private firms deliberately restrict commodity output to inflate market price levels and maximize profit margins.

State-imposed maximum price ceilings guarantee an economic surplus of basic commodities across public retail outlets.

Show answer & explanation

Answer: Central planning bodies lack dynamic market price signals required to calculate consumer preferences and allocate resources efficiently.

Answer

Central planning bodies lack dynamic market price signals required to calculate consumer preferences and allocate resources efficiently.

The correct response highlights the economic calculation problem inherent in command systems. Because the state sets official prices independently of supply and demand, planners lack market price signals necessary to adjust production output to shifting consumer needs, leading to inefficiency and shortages.

Step-by-Step Solution

Identify the fundamental mechanism of resource allocation in a command economy.

Resource allocation and prices are dictated by a central state authority rather than decentralized market interaction.

Command systems replace market prices with centralized state directives.

Analyze why central planning leads to persistent supply shortages.

Without price signals determined by consumer demand and supply, state planners face an information deficit and cannot calculate consumer valuation or relative scarcity accurately.

Prices in a free market convey vital economic information; suppressing them prevents efficient resource distribution.

Key Concept

Economic calculation problem and the absence of price signals in central planning

Question 5005Question →

Arrange the following ecological events in the correct chronological sequence as they occur when a major crude oil spill affects a marine aquatic ecosystem.

Drag items to arrange them in the correct order

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Answer

The correct chronological sequence is: (1) Formation of a dense layer of crude oil across the water surface, (2) Restriction of light penetration and inhibition of atmospheric gas exchange, (3) Depletion of dissolved oxygen due to reduced photosynthesis and microbial decomposition of hydrocarbons, and (4) Widespread mortality of fish, marine invertebrates, and benthic organisms.

The correct sequence begins with the physical discharge of crude oil forming a floating surface slick. This slick immediately blocks sunlight penetration and impedes atmospheric oxygen diffusion into the water. As a result, photosynthetic oxygen production drops while aerobic bacteria rapidly consume available dissolved oxygen to break down the oil. Finally, the severe drop in dissolved oxygen and toxic effects cause widespread asphyxiation and death among aquatic organisms.

Step-by-Step Solution

Identify the initial physical impact of the pollutant release

Crude oil forms an insoluble floating slick over the water surface.

Crude oil is less dense than water and hydrophobic, causing it to spread out across the air-water interface.

Determine the immediate physical disruption to ecosystem processes

Sunlight penetration is blocked and gaseous exchange between the atmosphere and water is restricted.

The opaque surface film acts as a mechanical barrier preventing solar energy absorption by phytoplankton and gaseous diffusion.

Evaluate the chemical changes within the water column

Dissolved oxygen levels drop significantly.

Photosynthesis by primary producers declines due to lack of light, while aerobic decomposers multiply and consume oxygen to break down oil hydrocarbons.

Determine the final biological effect on the aquatic community

Aquatic fauna experience widespread suffocation and death.

Prolonged dissolved oxygen depletion (hypoxia) combined with hydrocarbon toxicity causes asphyxiation in fish and marine invertebrates.

Key Concept

Aquatic Degradation from Oil Spills

Estimated Time:1m 30s

Question 5006Question →

Match each economic transaction or receipt under the income method of measuring national income with its correct factor income classification or accounting treatment.

Click a left item, then click its matching right item

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Answer

State pensions and unemployment relief grants match with Transfer payment (Excluded from National Income); Dividends distributed to shareholders match with Corporate profit component; Net income earned by a sole proprietor matches with Mixed income of the self-employed; Royalties received by a landowner match with Rental income.

The income method measures national income by summing all factor rewards earned by residents for participating in current economic production: compensation of employees (wages/salaries), rental income (including land royalties), net interest, corporate profits (dividends, retained earnings, tax), and mixed income of the self-employed. Receipts that do not correspond to productive output, such as welfare grants and pensions, are transfer payments and are strictly excluded.

Step-by-Step Solution

Identify non-factor payments that do not reflect current economic output.

Unemployment grants and state pensions are non-factor receipts (transfer payments) and must be excluded from Gross Domestic Product under the income approach.

Including transfer payments leads to double counting, as no productive activity occurred in exchange for the payment during the current accounting period.

Classify earnings from corporate enterprise ownership.

Dividends paid out of corporate profits are factor payments accruing to shareholders for providing entrepreneurial risk capital.

Corporate profits consist of dividends, corporate taxes, and undistributed profits, all of which are included under factor incomes.

Determine the classification of self-employed earnings.

Income of an independent sole proprietor is classified as mixed income of the self-employed.

Unincorporated business owners blend wage income, interest, rent, and profit into a single unseparated income pool.

Classify earnings derived from natural resources and property rights.

Royalties paid for mineral extraction rights on land are grouped under rental income.

Rent includes payments for the use of land and natural resources in production.

Key Concept

Classification of Factor Incomes and Non-Factor Receipts in National Income Accounting

Estimated Time:1m 30s

Question 5007Question →

Which of the following options represents the correct chronological order of establishment for these post-independence Nigerian revenue allocation bodies and committees, from earliest to latest?

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Answer

The correct chronological order is Dina Interim Revenue Allocation Committee (1968), followed by Aboyade Technical Committee on Revenue Allocation (1977), then Okigbo Presidential Commission on Revenue Allocation (1980), and lastly Revenue Mobilization Allocation and Fiscal Commission (1989).

The correct sequence begins with the Dina Interim Committee (1968), followed by the Aboyade Technical Committee (1977), then the Okigbo Presidential Commission (1980), and finishes with the establishment of the Revenue Mobilization Allocation and Fiscal Commission (1989).

Step-by-Step Solution

Determine the establishment year of the Dina Committee.

The Dina Interim Revenue Allocation Committee was established in 1968.

It was commissioned during the Nigerian Civil War era under General Gowon to address fiscal imbalance after state creation.

Determine the establishment year of the Aboyade Technical Committee.

The Aboyade Technical Committee was set up in 1977.

It introduced technical criteria such as national minimum standards and equality of access to development opportunities.

Determine the establishment year of the Okigbo Commission.

The Okigbo Presidential Commission was inaugurated in 1980.

It was established under the civilian Second Republic headed by President Shehu Shagari.

Determine the establishment year of the RMAFC.

The Revenue Mobilization Allocation and Fiscal Commission was created in 1989.

It was established as a permanent constitutional body under Decree 49 of 1989 during Babangida's military regime.

Key Concept

Chronological evolution of post-independence revenue allocation commissions in Nigerian fiscal federalism

Estimated Time:1m 30s

Question 5008Question →

Suppose an economy is experiencing severe demand-pull inflation caused by excessive liquidity and rapid credit expansion across commercial banks. Which combination of monetary policy actions should the Central Bank implement to effectively contract the money supply and restore macroeconomic stability?

Raise the reserve requirement, increase the bank rate, and sell government securities through open market operations.

Lower the reserve requirement, reduce the bank rate, and purchase government securities through open market operations.

Raise the reserve requirement, lower the bank rate, and purchase government securities through open market operations.

Lower the reserve requirement, increase the bank rate, and purchase government securities through open market operations.

Show answer & explanation

Answer: Raise the reserve requirement, increase the bank rate, and sell government securities through open market operations.

Answer

Raise the reserve requirement, increase the bank rate, and sell government securities through open market operations.

To control high inflation and excess liquidity, the central bank must apply contractionary monetary measures. Raising the reserve requirement reduces loanable funds available to commercial banks; raising the discount/bank rate makes borrowing from the central bank more expensive, causing commercial interest rates to rise; and selling government securities directly mops up liquid reserves from financial institutions and the public.

Step-by-Step Solution

Identify the macroeconomic problem

The economy faces demand-pull inflation fueled by excess money supply and over-expansion of credit.

Choosing the appropriate policy requires determining whether contractionary or expansionary policy is needed.

Determine the required monetary policy stance

A contractionary (tight) monetary policy is required to drain liquidity.

Reducing money supply reduces aggregate demand and stabilizes general price levels.

Select and evaluate monetary policy instruments

Raising the cash reserve ratio locks up bank funds, raising the bank rate increases borrowing costs, and selling treasury bills in Open Market Operations (OMO) absorbs excess public cash reserves.

All three measures work synergistically in the same direction to restrict total credit creation.

Key Concept

Contractionary Monetary Policy Tools

Estimated Time:1m 30s

Question 5009Question →

In a given trade period, Country X recorded an export price index of $150$ and an import price index of $120$ . What is the Net Barter Terms of Trade for Country X?

125.0

80.0

130.0

180.0

Show answer & explanation

Answer: $125.0$

Answer

The Net Barter Terms of Trade for Country X is

125.0

The Net Barter Terms of Trade is defined as the ratio of the index of export prices to the index of import prices, multiplied by

100

. Substituting

150

for export prices and

120

for import prices gives

\frac{150}{120} \times 100 = 125.0

. A value above

100

indicates a favorable terms of trade.

Step-by-Step Solution

Identify the formula for Net Barter Terms of Trade

\text{Net Barter Terms of Trade} = \left( \frac{\text{Index of Export Prices}}{\text{Index of Import Prices}} \right) \times 100

The Net Barter Terms of Trade measures the relative price of exports in terms of imports.

Substitute the given values into the formula

\text{Net Barter Terms of Trade} = \left( \frac{150}{120} \right) \times 100

The export price index is

150

and the import price index is

120

Compute the final ratio

1.25 \times 100 = 125.0

Dividing

150

120

yields

1.25

, which multiplied by

100

gives an index of

125.0

Key Concept

Net Barter Terms of Trade

Question 5010Question →

Arrange the following poikilothermic vertebrates in increasing order of cardiac structural complexity, starting from the organism with the simplest heart layout to the one with the most completely divided cardiac chambers:

Drag items to arrange them in the correct order

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Answer

The correct sequence from simplest to most complex cardiac chamber layout is: Tilapia (*Oreochromis niloticus*), Toad (*Sclerophrys regularis*), Lizard (*Agama agama*), and Crocodile (*Crocodylus niloticus*).

The correct sequence reflects progressive cardiac chamber division in poikilotherms: Tilapia has 2 chambers (1 atrium, 1 ventricle); Toad has 3 chambers with an undivided ventricle; Lizard has 3 chambers with a partially divided ventricle; and Crocodile has 4 complete chambers with a fully formed septum.

Step-by-Step Solution

Identify the cardiac chamber configuration for the fish species (Tilapia).

Fish have a 2-chambered heart (1 atrium, 1 ventricle) with single circulation, representing the baseline poikilothermic vertebrate structure.

Pisces exhibit the simplest vertebrate heart design.

Identify the cardiac chamber configuration for the amphibian species (Toad).

Amphibians have a 3-chambered heart (2 atria, 1 completely undivided ventricle) enabling dual systemic and pulmocutaneous circuits.

Amphibia possess two receiving chambers but share a single pumping ventricle.

Identify the cardiac chamber configuration for the non-crocodilian reptile species (Lizard).

Lizards have a 3-chambered heart with an incomplete septum partially partitioning the single ventricle.

Squamate reptiles demonstrate an intermediate evolutionary step that reduces mixing of oxygenated and deoxygenated blood.

Identify the cardiac chamber configuration for the crocodilian reptile species (Crocodile).

Crocodilians possess a fully 4-chambered heart with two atria and two completely separated ventricles.

Crocodilia represent the highest degree of cardiac chamber division among poikilotherms.

Key Concept

Evolutionary progression of heart chamber separation in poikilothermic vertebrates

Question 5011Question →

In a perfectly competitive market structure, because an individual firm faces a perfectly elastic demand curve at the prevailing market price, the aggregate industry demand curve is also perfectly elastic.

True

False

Show answer & explanation

Answer: False

Answer

The statement is False. In perfect competition, an individual firm faces a horizontal (perfectly elastic) demand curve because it is a price taker, but the aggregate industry demand curve is downward-sloping.

The statement is false because an individual firm's perfectly elastic demand curve stems strictly from its price-taker status in a market of numerous small producers, whereas the aggregate industry demand curve slopes downward from left to right in accordance with the law of demand.

Step-by-Step Solution

Examine the demand curve facing an individual firm under perfect competition.

Because an individual firm produces an insignificant fraction of total market output and sells a homogeneous product, it cannot influence price and faces a horizontal demand curve where

P = MR = AR

(price elasticity of demand is infinite).

Firm price-taking behavior dictated by market assumptions.

Examine the aggregate market/industry demand curve.

The industry demand curve is derived from the horizontal summation of all individual consumer demand curves in the market and slopes downward from left to right.

Law of demand applies at the aggregate market level.

Evaluate the relationship between firm-level elasticity and industry-level elasticity.

Equating the individual firm's price-taker demand curve elasticity with the industry's demand curve elasticity is economically incorrect.

Market price is determined by the intersection of downward-sloping market demand and upward-sloping market supply.

Key Concept

Distinction between firm demand curve (perfectly elastic) and industry demand curve (downward-sloping) under perfect competition.

Question 5012Question →

Match each structural adaptation mechanism listed on the left with its corresponding biological example on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Cryptic coloration matches the peppered moth blending into tree bark; Warning coloration matches the toxic poison dart frog's bright markings; Batesian mimicry matches the harmless hoverfly resembling a wasp; Müllerian mimicry matches two unpalatable butterfly species sharing similar warning patterns.

Each adaptation mechanism correctly corresponds to its biological definition and ecological function: cryptic coloration hides organisms in their habitat; warning coloration advertises toxicity; Batesian mimicry protects a harmless species by copying a dangerous model; and Müllerian mimicry reinforces predator avoidance through shared warning signals among harmful species.

Step-by-Step Solution

Identify Cryptic Coloration

Matches the peppered moth blending into lichen-covered tree bark.

Cryptic coloration serves to conceal the organism from predators or prey by matching the background.

Identify Warning Coloration (Aposematism)

Matches the toxic poison dart frog displaying vivid red and yellow markings.

Warning coloration uses bright, conspicuous colors to signal distastefulness or dangerous defenses.

Distinguish between Batesian and Müllerian Mimicry

Batesian mimicry pairs the harmless hoverfly with the wasp. Müllerian mimicry pairs the two unpalatable butterfly species.

Batesian mimicry involves a harmless (palatable) mimic copying a harmful model, whereas Müllerian mimicry involves multiple harmful (unpalatable) species sharing a common warning appearance.

Key Concept

Structural Adaptations for Survival: Coloration, Camouflage, and Mimicry

Question 5013Question →

Both diamond and graphite consist entirely of elemental carbon in the solid state, yet they exhibit markedly different physical properties such as hardness and electrical conductivity. Which of the following statements accurately explains why they are classified as allotropes?

They represent different structural forms of the same element existing in the same physical state.

They consist of atoms of the same element with identical atomic numbers but different mass numbers.

They are compounds possessing the exact same molecular formula but different structural arrangements of atoms.

They are different physical states of carbon formed at different environmental temperatures.

Show answer & explanation

Answer: They represent different structural forms of the same element existing in the same physical state.

Answer

Diamond and graphite are classified as allotropes because they represent different structural forms of the same element in the same physical state.

The correct option accurately states that allotropes are different structural arrangements of the same element within the same physical state. In diamond, each carbon atom is tetrahedrally bonded (

sp^3

hybridized), whereas in graphite, carbon atoms form planar hexagonal layers (

sp^2

hybridized).

Step-by-Step Solution

Define allotropy in the context of main-group non-metals like carbon.

Allotropy is identified as the phenomenon where a single element exists in multiple structural forms within the same physical state (e.g., solid graphite, diamond, and fullerenes).

Understanding the precise chemical definition distinguishes allotropy from related chemical concepts.

Compare allotropy with alternative concepts such as isotopy, isomerism, and phase changes.

Isotopes differ by mass/neutrons, isomers are distinct compound structures with equal formulas, and physical states refer to solid/liquid/gas phases.

Eliminating definitions of isotopes, isomers, and state changes ensures accurate concept identification.

Key Concept

Allotropy of Carbon

Question 5014Question →

A consumer's maximum willingness to pay for successive packets of milk in a retail market is given in the schedule below:

Unit of Milk	Maximum Willingness to Pay (₦)
1st	500
2nd	400
3rd	300
4th	200
5th	100

If the market price of a packet of milk is fixed at ₦200, what is the total consumer surplus (in Naira) enjoyed by the consumer when purchasing 4 packets?

Show answer & explanation

Answer: 600

Answer

The total consumer surplus enjoyed by the consumer is 600 Naira.

Total willingness to pay for the 4 packets of milk is

500 + 400 + 300 + 200 = 1400

Naira. The actual total expenditure for 4 packets at the uniform market price of 200 Naira is

4 \times 200 = 800

Naira. Subtracting the actual total expenditure from total willingness to pay gives a consumer surplus of

1400 - 800 = 600

Naira.

Step-by-Step Solution

Calculate total willingness to pay for 4 packets

₦1,400

Sum the maximum prices the consumer is willing to pay for the first 4 units:

500 + 400 + 300 + 200 = 1400

Calculate total actual expenditure

₦800

Multiply the market price per unit by the total number of units purchased:

4 \times 200 = 800

Subtract total actual expenditure from total willingness to pay

₦600

Consumer surplus is the net monetary gain obtained when total valuation exceeds total expenditure:

1400 - 800 = 600

Key Concept

Consumer Surplus is the difference between the maximum total amount a consumer is willing to pay for a commodity and the actual total amount paid at the prevailing market price.

Estimated Time:1m 30s

Question 5015Question →

The table below shows the output of Cocoa (bags) and Solar Panels (units) produced per unit of labor in Country A and Country B:

Country	Cocoa (bags)	Solar Panels (units)
Country A	50	25
Country B	40	40

Before trade, each country possesses 10 units of labor and allocates 5 units of labor to Cocoa production and 5 units of labor to Solar Panel production. If both countries decide to specialize completely according to the principle of comparative advantage, what is the net increase in total world output of Cocoa?

Show answer & explanation

Answer: 50

Answer

The net increase in total world output of Cocoa is 50 bags.

Country A has a lower opportunity cost of Cocoa (

0.5

Solar Panels per bag of Cocoa compared to Country B's

1.0

Solar Panel per bag of Cocoa), giving Country A a comparative advantage in Cocoa. Before specialization, world Cocoa production is

(5 \times 50) + (5 \times 40) = 450

bags. Upon complete specialization, Country A uses all 10 labor units to produce

10 \times 50 = 500

bags of Cocoa. The net gain in total world output of Cocoa is

500 - 450 = 50

bags.

Step-by-Step Solution

Determine opportunity costs and comparative advantage for Cocoa

Country A's opportunity cost of 1 Cocoa = 0.5 Solar Panels; Country B's opportunity cost of 1 Cocoa = 1.0 Solar Panel. Country A specializes in Cocoa.

Comparative advantage belongs to the country with the lower opportunity cost in producing that commodity.

Calculate initial total world output of Cocoa before specialization

Country A:

5 \text{ labor units} \times 50 = 250 \text{ bags}

; Country B:

5 \text{ labor units} \times 40 = 200 \text{ bags}

. Total initial Cocoa output = 450 bags.

Each country initially allocates half of its 10 labor units (5 units) to Cocoa production.

Calculate total world output of Cocoa after complete specialization

Country A:

10 \text{ labor units} \times 50 = 500 \text{ bags}

; Country B: 0 bags. Total post-specialization Cocoa output = 500 bags.

Country A devotes all 10 labor units to Cocoa production.

Calculate the net increase in total world Cocoa output

500 \text{ bags} - 450 \text{ bags} = 50 \text{ bags}

Subtract initial aggregate output from post-specialization aggregate output.

Key Concept

Theory of Comparative Advantage and World Production Gains

Question 5016Question →

Match each stage of production in a cocoa-to-chocolate processing chain with its correct Net Value Added contribution to National Income based on the output method of measurement.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Stage 1 matches Net Value Added of ₦120,000; Stage 2 matches Net Value Added of ₦150,000; Stage 3 matches Net Value Added of ₦210,000; Stage 4 matches Net Value Added of ₦170,000.

The output (value added) method measures national income by summing the net incremental value created at each stage of production. For each stage, Value Added = Gross Value of Output minus Cost of Intermediate Inputs. This ensures intermediate goods are counted only once and eliminates double counting.

Step-by-Step Solution

Calculate Value Added for Stage 1

Gross Output (₦120,000) - Intermediate Purchases (₦0) = ₦120,000

The initial primary production stage has no intermediate cost inputs.

Calculate Value Added for Stage 2

Gross Output (₦270,000) - Intermediate Cost (₦120,000) = ₦150,000

Deduct the cost of raw cocoa beans purchased from Stage 1 to avoid double counting.

Calculate Value Added for Stage 3

Gross Output (₦480,000) - Intermediate Cost (₦270,000) = ₦210,000

Deduct the cost of cocoa butter purchased from Stage 2.

Calculate Value Added for Stage 4

Gross Output (₦650,000) - Intermediate Cost (₦480,000) = ₦170,000

Deduct the wholesale cost of finished chocolates from final retail revenue.

Key Concept

Output (Value Added) Method of Measurement

Question 5017Question →

An economy has a Gross National Product (GNP) of $\text{N}750$ million and a Net National Product (NNP) of $\text{N}680$ million. What is the value of the capital consumption allowance?

\text{N}70

million

\text{N}680

million

\text{N}750

million

\text{N}1,430

million

Show answer & explanation

Answer: $\text{N}70$ million

Answer

\text{N}70

million

The correct answer is derived by subtracting Net National Product (NNP) from Gross National Product (GNP). Since NNP reflects total production minus wear and tear on capital goods (depreciation), the difference between

\text{N}750

million and

\text{N}680

million equals the capital consumption allowance of

\text{N}70

million.

Step-by-Step Solution

Identify the relationship between Gross National Product (GNP), Net National Product (NNP), and Capital Consumption Allowance (Depreciation).

\text{NNP} = \text{GNP} - \text{Depreciation}

Net National Product represents gross national output after accounting for the depreciation of capital assets.

Rearrange the identity to solve for Depreciation (Capital Consumption Allowance).

\text{Capital Consumption Allowance} = \text{GNP} - \text{NNP}

Isolating the depreciation component allows direct computation from given figures.

Substitute the given numerical values into the rearranged formula.

\text{Capital Consumption Allowance} = \text{N}750\text{ million} - \text{N}680\text{ million} = \text{N}70\text{ million}

Subtracting

\text{N}680

million from

\text{N}750

million yields the correct depreciation value.

Key Concept

Relationship between Gross and Net National Income Aggregates

Question 5018Question →

Which of the following international transactions is specifically recorded in the computation of a country's balance of trade?

Exports and imports of physical merchandise

Foreign direct investments and portfolio capital inflows

Freight earnings and banking fees for international services

Unilateral transfer payments and foreign aid receipts

Show answer & explanation

Answer: Exports and imports of physical merchandise

Answer

The export and import of physical merchandise is the correct choice because the balance of trade strictly records visible (tangible) trade transactions.

The correct option is exports and imports of physical merchandise because the balance of trade measures the difference between visible exports and visible imports of tangible goods only.

Step-by-Step Solution

Define Balance of Trade

Balance of trade is defined as the difference between the monetary value of a nation's visible exports and visible imports over a given period.

Understanding the precise scope of balance of trade isolates it from broader account definitions.

Classify the given transaction categories

Physical merchandise belongs to visible trade; services belong to invisible trade; investments belong to the capital/financial account; foreign aid belongs to net transfers.

Categorizing each option clarifies which item enters the balance of trade calculation.

Key Concept

Structure of the Balance of Payments: Balance of Visible Trade

Question 5019Question →

An economic analysis categorizes four Nigerian workers based on their primary productive activities:
- Worker P harvests raw rubber latex from a rubber plantation.
- Worker Q processes raw rubber latex into automotive tyres in a factory.
- Worker R designs and sews bespoke traditional garments directly for individual private clients.
- Worker S operates a public warehousing facility storing manufactured goods for regional wholesalers.

Based on the classification of occupations in commerce, which of the following statements correctly identifies the occupational categories of these four workers?

Worker P is in a primary occupation, Worker Q is in a secondary occupation, Worker R is in a direct service tertiary occupation, and Worker S is in a commercial service tertiary occupation.

Worker P is in a primary occupation, Worker Q is in a secondary occupation, Worker R is in a commercial service tertiary occupation, and Worker S is in a direct service tertiary occupation.

Worker P and Worker Q are both in secondary occupations, while Worker R and Worker S are both in commercial service tertiary occupations.

Worker P is in a primary occupation, Worker Q is in a secondary occupation, Worker R is engaged in direct production, and Worker S is engaged in indirect production.

Show answer & explanation

Answer: Worker P is in a primary occupation, Worker Q is in a secondary occupation, Worker R is in a direct service tertiary occupation, and Worker S is in a commercial service tertiary occupation.

Answer

Worker P is in a primary occupation, Worker Q is in a secondary occupation, Worker R is in a direct service tertiary occupation, and Worker S is in a commercial service tertiary occupation.

The correct answer accurately evaluates each of the four stages of production and occupation. Harvesting rubber latex from nature is a primary extractive occupation. Transforming that latex into factory-manufactured tyres is a secondary manufacturing occupation. Providing personal custom tailoring directly to individual clients for fee is a direct service tertiary occupation. Managing a warehouse to aid wholesale distribution is an auxiliary to trade, making it a commercial service tertiary occupation.

Step-by-Step Solution

Analyze Worker P's activity (rubber latex harvesting).

Harvesting raw materials directly from natural plantation sources belongs to the primary (extractive) sector.

Primary occupations involve obtaining raw natural resources directly from land, water, or nature.

Analyze Worker Q's activity (processing latex into tyres).

Converting raw materials into finished industrial products belongs to the secondary (manufacturing) sector.

Secondary occupations process raw materials into semi-finished or finished consumer/industrial goods.

Analyze Worker R's activity (custom sewing for private individuals).

Providing personal, tailored services paid directly by individual consumers belongs to direct service tertiary occupations.

Direct services are non-commercial tertiary activities rendered directly to consumers, paid for by the individual.

Analyze Worker S's activity (operating a warehousing facility for wholesalers).

Warehousing is an auxiliary to trade, placing it in commercial service tertiary occupations.

Commercial services consist of trade and auxiliaries to trade (transport, warehousing, insurance, banking) that facilitate the distribution of goods.

Key Concept

Classification of Primary, Secondary, and Tertiary (Direct vs Commercial) Occupations

Question 5020Question →

A field biologist collects a poikilothermic vertebrate specimen from an arid environment. Anatomical examination reveals dry epidermal scales, a heart with two atria and a partially divided ventricle, and an egg with a leathery shell. Which of the following correctly identifies the species using proper binomial nomenclature, along with its main nitrogenous waste product?

*Agama agama*, primary waste uric acid

*Agama Agama*, primary waste urea

*Sclerophrys regularis*, primary waste ammonia

*Tilapia zillii*, primary waste uric acid

Show answer & explanation

Answer: *Agama agama*, primary waste uric acid

Answer

*Agama agama*, primary waste uric acid

Reptiles such as the rainbow lizard (*Agama agama*) possess dry epidermal scales, a heart with two atria and a partially divided ventricle, and lay shelled amniotic eggs. They excrete uric acid to minimize water loss. The binomial name is formatted correctly with a capitalized genus name and a lower-case species name.

Step-by-Step Solution

Analyze anatomical characteristics provided in the stem

Dry epidermal scales, a heart with two atria and a partially divided ventricle, and a leathery cleidoic egg are definitive diagnostic traits of the class Reptilia.

Reptiles are adapted for terrestrial life through epidermal scales to prevent desiccation, a partially septated ventricle to reduce mixing of oxygenated and deoxygenated blood, and amniotic eggs.

Determine the primary nitrogenous waste product

Reptiles excrete nitrogenous waste primarily as insoluble uric acid.

Uric acid requires minimal water for excretion, serving as a critical water-conserving adaptation for terrestrial life.

Apply binomial nomenclature formatting rules

The scientific name must have the genus name capitalized (*Agama*) and the species name in lower case (*agama*), italicized or underlined.

Standard International Code of Zoological Nomenclature (ICZN) rules mandate lower case for specific epithets.

Key Concept

Distinctive anatomical and physiological adaptations of Reptilia compared to Pisces and Amphibia

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