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Question 12261Question →

Arrange the following African mountain peaks in order of their elevation, starting from the HIGHEST peak to the LOWEST peak.

Drag items to arrange them in the correct order

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Answer

The correct sequence from highest to lowest peak elevation is Mount Kilimanjaro (5,895 m), Mount Kenya (5,199 m), Mount Cameroon (4,040 m), and Mount Tahat (2,908 m).

Mount Kilimanjaro is the highest point on the African continent at 5,895 meters above sea level. Mount Kenya follows as the second-highest peak at 5,199 meters. Mount Cameroon is the third-highest among these at 4,040 meters, while Mount Tahat in the Ahaggar Massif of Algeria is the lowest of the four at 2,908 meters.

Step-by-Step Solution

Identify the elevation of each listed African landform peak.

Mount Kilimanjaro (~5,895 m), Mount Kenya (~5,199 m), Mount Cameroon (~4,040 m), Mount Tahat (~2,908 m).

Determining the absolute or relative height of each peak establishes the baseline for comparison.

Sequence the peaks in descending order from maximum height to minimum height.

Mount Kilimanjaro > Mount Kenya > Mount Cameroon > Mount Tahat.

Comparing peak heights from highest to lowest yields the correct sequence.

Key Concept

Elevation Profiles of Major African Mountain Peaks

Question 12262Question →

In a flood-prone tropical river valley where shifting cultivation was historically practiced on fragmented communal land, a government project constructs a continuous flood embankment along the main river channel while simultaneously establishing individual land titles for consolidated commercial farms across the basin. Which spatial transformation of rural settlement patterns is most likely to occur in this region over time?

A shift from nucleated dry-point settlements on isolated natural levees toward a dual pattern of linear settlements along the embankment and dispersed homesteads on consolidated farm plots

A complete transition from dispersed farmsteads into a star-shaped nucleated settlement centered exclusively around the headwaters of the main river

The emergence of a uniform dispersed pattern driven by the pull factor of annual seasonal flooding across the river floodplains

A transition from a dispersed arrangement to a tightly clustered wet-point settlement aligned directly within the active river channel

Show answer & explanation

Answer: A shift from nucleated dry-point settlements on isolated natural levees toward a dual pattern of linear settlements along the embankment and dispersed homesteads on consolidated farm plots

Answer

A shift from nucleated dry-point settlements on isolated natural levees toward a dual pattern of linear settlements along the embankment and dispersed homesteads on consolidated farm plots

Prior to intervention, seasonal flooding forces settlements onto natural levees as nucleated dry-point villages. Constructing a continuous flood embankment introduces an elongated, flood-safe elevated corridor that naturally attracts linear settlement. Simultaneously, replacing fragmented communal holdings with consolidated private farms removes the social necessity of clustered living, allowing farmers to build dispersed homesteads directly on their farm plots. The result is a dual spatial pattern combining linear growth along the embankment with dispersed settlement in the agricultural interior.

Step-by-Step Solution

Analyze the baseline physical and cultural settlement controls prior to intervention.

In flood-prone basins with fragmented communal farming, settlements cluster on higher ground (natural levees) as nucleated dry-point villages for flood safety and shared agricultural labor.

Physical hazards (flooding) and socio-economic systems (communal tenure) dictate initial nucleated dry-point morphology.

Evaluate the impact of the physical infrastructure change (continuous flood embankment).

The embankment creates an elongated elevated strip above flood level that doubles as a transport route, promoting linear (ribbon) settlement growth along its line.

Linear settlements naturally develop along artificial infrastructure providing flood protection and access.

Evaluate the impact of the socio-economic change (land consolidation and individual titling).

Consolidating fragmented holdings into private commercial plots encourages farmers to reside directly on their land to minimize commuting and maximize farm management.

Individualized land tenure and extensive contiguous land ownership favor dispersed rural settlement patterns.

Synthesize the combined outcome of both physical and socio-economic drivers.

The region evolves into a hybrid spatial structure combining linear settlement along the embankment with dispersed farmsteads across the consolidated agricultural interior.

Simultaneous physical flood defense infrastructure and economic land reform create complementary settlement incentives.

Key Concept

Interaction of Physical Site Determinants (Dry-Point/Linear Infrastructure) and Socio-Economic Land Tenure Systems on Rural Settlement Evolution

Question 12263Question →

Pair each demographic concept listed on the left with the statement on the right that best describes its structural behavior or analytical measurement.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Demographic Momentum corresponds to the continued expansion of a population after reaching replacement-level fertility due to a broad young age base; Optimum Population corresponds to the demographic state where resources yield maximum income per head; Rate of Natural Increase corresponds to the net annual growth rate derived strictly from the difference between crude birth and death rates; and Fecundity corresponds to the physiological maximum capability to produce live offspring.

Demographic Momentum is the structural lag in growth caused by a youthful age distribution; Optimum Population is the balance point for maximum per capita output; Rate of Natural Increase measures birth minus death rates without migration; and Fecundity reflects physiological reproductive potential.

Step-by-Step Solution

Examine Demographic Momentum

Identified as population inertia driven by age structure.

Even when birth rates drop to replacement level, a large proportion of young individuals entering childbearing years ensures overall population growth persists.

Examine Optimum Population

Identified as economic equilibrium per capita.

It describes the exact demographic size relative to capital and technology that maximizes economic return per person.

Examine Rate of Natural Increase

Identified as vital rate growth metric.

Natural increase isolates internal growth derived by subtracting Crude Death Rate from Crude Birth Rate without incorporating net migration.

Examine Fecundity

Identified as biological reproductive capacity.

Fecundity represents potential biological output rather than empirical live birth rates (fertility).

Key Concept

Demographic Concepts and Population Growth Dynamics

Estimated Time:2m 0s

Question 12264Question →

A demographic survey of an agricultural district in West Africa recorded a total population of $80{}000$ inhabitants. The survey broke down the population into $25{}000$ children (aged $0-14$ ), $45{}000$ economically active adults (aged $15-64$ ), and $10{}000$ elderly persons (aged $65$ and above). What is the overall age dependency ratio of this district?

77.8\%

128.6\%

43.8\%

55.6\%

Show answer & explanation

Answer: $77.8\%$

Answer

The overall age dependency ratio of the district is

77.8\%

The overall age dependency ratio is computed by taking the total dependent population (children aged 0–14 plus elderly aged 65+) and dividing it by the working-age population (aged 15–64), then multiplying by 100. Adding

25{}000

children and

10{}000

elderly gives

35{}000

dependents. Dividing

35{}000

by the

45{}000

productive adults yields approximately

77.8\%

Step-by-Step Solution

Calculate total dependent population

25{}000 + 10{}000 = 35{}000

The dependent population consists of children under 15 years and elderly citizens aged 65 and above.

Identify working-age population

45{}000

The economically active population includes individuals aged 15 to 64 years.

Apply age dependency ratio formula

\text{Age Dependency Ratio} = \frac{35{}000}{45{}000} \times 100 = 77.777...\% \approx 77.8\%

The age dependency ratio measures the demographic burden on the productive population per 100 working individuals.

Key Concept

Age Dependency Ratio Calculation

Estimated Time:1m 30s

Question 12265Question →

Arrange the following African climatic zones in correct latitudinal sequence, starting from the Equator ( $0^\circ$ ) and moving northwards toward the Mediterranean coast.

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Answer

The correct latitudinal sequence from the Equator northwards to the coast is: Equatorial Climate Zone, Tropical Wet-and-Dry (Sudan Savanna) Climate Zone, Semi-Arid Steppe (Sahelian) Climate Zone, Tropical Continental Desert (Sahara) Climate Zone, and Mediterranean Climate Zone.

Africa exhibits a near-symmetrical latitudinal arrangement of climatic zones away from the Equator. Moving northwards from

0^\circ

, atmospheric pressure systems and solar radiation produce sequential climatic belts: Equatorial (

0^\circ

), Savanna (

5^\circ-15^\circ\text{N}

), Sahelian Steppe (

15^\circ-20^\circ\text{N}

), Sahara Desert (

20^\circ-30^\circ\text{N}

), and Mediterranean (

30^\circ-37^\circ\text{N}

Step-by-Step Solution

Identify the climatic belt situated directly on the Equator (

0^\circ

The Equatorial (Tropical Rainforest) Climate Zone sits at the center (

0^\circ

High sun angles and continuous ITCZ influence create this wet equatorial core.

Determine the zone directly adjacent to the Equatorial belt moving northward (

5^\circ\text{N}

15^\circ\text{N}

The Tropical Wet-and-Dry (Sudan Savanna) Climate Zone is next.

This region experiences distinct wet and dry seasons driven by the seasonal migration of the ITCZ.

Identify the narrow transitional zone lying between

15^\circ\text{N}

and

20^\circ\text{N}

The Semi-Arid Steppe (Sahelian) Climate Zone follows the Savanna.

It acts as a semi-arid buffer between the moist savanna and the hyper-arid desert.

Locate the major high-pressure arid zone between

20^\circ\text{N}

and

30^\circ\text{N}

The Tropical Continental Desert (Sahara) Climate Zone forms the fourth belt.

Subsiding air masses under the subtropical high-pressure cell maintain extreme aridity.

Identify the northern coastal margin zone beyond

30^\circ\text{N}

The Mediterranean Climate Zone forms the final northern belt.

Influenced by winter mid-latitude westerlies, it brings mild rainy winters and dry summers to the northern coast.

Key Concept

Symmetrical Latitudinal Distribution of African Climate Belts

Question 12266Question →

A topographical map drawn to a Representative Fraction (R.F.) scale of $1 : 50,000$ is enlarged to twice its original linear dimensions. What is the scale of the new enlarged map?

1 : 100,000

1 : 25,000

1 : 12,500

1 : 200,000

Show answer & explanation

Answer: $1 : 25,000$

Answer

The scale of the new enlarged map is

1 : 25,000

Enlarging a map increases its scale, making the scale denominator smaller. When a map is enlarged to twice its linear size (

2\times

), the denominator of the original Representative Fraction (

50,000

) is divided by

2

, yielding a new scale of

1 : 25,000

Step-by-Step Solution

Identify the original scale denominator and the linear enlargement factor.

Original scale denominator =

50,000

; Linear factor (

k

) =

2

Map enlargement alters the scale denominator inversely proportional to the linear change.

Calculate the new scale denominator by dividing the original denominator by the linear enlargement factor.

New denominator =

\frac{50,000}{2} = 25,000

Enlarging a map makes features larger on paper, which corresponds to a larger scale with a smaller denominator.

State the new Representative Fraction (R.F.) scale.

New scale =

1 : 25,000

The new R.F. expresses the enlarged relationship between map distance and ground distance.

Key Concept

Linear Map Enlargement Scale Conversion

Estimated Time:45s

Question 12267Question →

Match each geological material in Group I with its precise genesis and primary industrial application in Group II.

Click a left item, then click its matching right item

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Answer

Pumice pairs with extrusive vesicular pyroclastic rock used as a lightweight aggregate; Diatomite pairs with siliceous organically-formed sedimentary rock used as a filtration medium; Graphite pairs with carbonaceous metamorphic product used as a solid lubricant; Gypsum pairs with chemical evaporite sedimentary rock used as a cement setting retarder.

Each item is matched according to its fundamental rock classification group (Igneous pyroclastic, Organo-sedimentary, Metamorphic mineral, and Chemical evaporite) alongside its documented commercial utility in industrial geography.

Step-by-Step Solution

Analyze the formation process and economic role of Pumice

Pumice is an extrusive igneous rock with a vesicular texture formed by trapped volcanic gases, making it light enough to float and useful as an abrasive or lightweight concrete component.

Understanding volcanic texture differentiates extrusive pyroclastics from crystalline intrusive bodies.

Analyze the formation process and economic role of Diatomite

Diatomite is an organically derived sedimentary rock made of silica-based skeletal remains of diatoms, used extensively for industrial fluid filtration.

Siliceous organic sediment contrasts with calcareous organic sediment such as chalk or limestone.

Analyze the formation process and economic role of Graphite

Graphite forms under high-temperature/pressure metamorphic transformation of carbonaceous matter in sediments, yielding a soft, heat-resistant conductor and solid lubricant.

Metamorphic recrystallization alters organic carbon into pure crystalline carbon lattices.

Analyze the formation process and economic role of Gypsum

Gypsum forms via chemical precipitation in arid evaporite environments and serves as a crucial setting-time regulator in cement manufacture.

Evaporite minerals precipitate directly from concentrated hypersaline water.

Key Concept

Genesis, micro-structural characteristics, and industrial applications of igneous, sedimentary, and metamorphic rock types.

Question 12268Question →

Arrange the following West African vegetation belts in correct sequential order, starting from the humid coastal region along the Gulf of Guinea in the south and moving northward toward the Sahara Desert.

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Answer

The correct sequence from south to north is Tropical Rainforest, followed by Guinea Savanna, Sudan Savanna, and Sahel Savanna.

The vegetation zones in West Africa form parallel east-west belts corresponding directly to decreasing annual rainfall from south to north: Tropical Rainforest (southern coast), Guinea Savanna (sub-humid belt), Sudan Savanna (dry savanna), and Sahel Savanna (semi-arid desert margin).

Step-by-Step Solution

Identify the primary climatic driver of vegetation distribution in West Africa.

Mean annual precipitation decreases progressively along a latitudinal gradient from the Atlantic coast northward.

The moist maritime winds from the South-West Monsoon weaken as distance from the Gulf of Guinea increases.

Identify the coastal vegetation zone receiving maximum rainfall.

Tropical Rainforest occupies the southernmost position.

It thrives in high heat and abundant moisture (>2000 mm/year) near the equator and southern coastline.

Arrange the savannas in order of decreasing tree density and moisture availability.

The order inland is Guinea Savanna (1000-1500 mm), Sudan Savanna (500-1000 mm), and Sahel Savanna (200-500 mm).

Drier conditions further inland reduce tree height and grass density, leading directly into the desert margin.

Key Concept

Latitudinal Zonation of African Vegetation Belts

Estimated Time:1m 0s

Question 12269Question →

The East African Rift System contains a prominent series of tectonic lakes formed along its eastern and western branches. Arrange the following major East African lakes in sequential order from north to south based on their latitudinal position.

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Answer

The correct sequence from north to south is Lake Turkana, followed by Lake Albert, then Lake Tanganyika, and finally Lake Malawi.

The correct spatial ordering from north to south follows the latitudinal positions: Lake Turkana is the northernmost (approx. 4°30' N to 2°30' N), followed by Lake Albert in the Albertine Rift (approx. 2°20' N to 1°10' N), then Lake Tanganyika south of the equator (approx. 3°20' S to 8°48' S), and Lake Malawi as the southern terminus (approx. 9°30' S to 14°25' S).

Step-by-Step Solution

Identify the northernmost lake among the listed rift valley lakes.

Lake Turkana sits in northern Kenya, reaching up to 4°30' N latitude.

It is positioned highest in the Northern Hemisphere among all major East African Rift lakes.

Determine the position of Lake Albert relative to Lake Turkana and the Equator.

Lake Albert is located in the northern arm of the Western Rift between 1°10' N and 2°20' N.

It lies south of Lake Turkana but remains entirely in the Northern Hemisphere north of Lake Tanganyika.

Locate Lake Tanganyika along the latitudinal gradient.

Lake Tanganyika spans across the Southern Hemisphere from 3°20' S to 8°48' S.

It occupies the central section of the Western Rift Valley, south of Lake Albert and the Equator.

Identify the southernmost lake in the East African Rift System sequence.

Lake Malawi (Nyasa) lies between 9°30' S and 14°25' S latitude.

It forms the southern extremity of the Great Rift Valley lake system.

Key Concept

Latitudinal Distribution of East African Rift Valley Lakes

Estimated Time:1m 30s

Question 12270Question →

Biomass energy derived from harvested timber is classified as a non-renewable natural resource because the thermal combustion of wood permanently destroys the physical organic material.

True

False

Show answer & explanation

Answer: False

Answer

The statement is False. Biomass from timber is classified as a renewable natural resource because biological growth and reforestation permit its continuous replenishment within human timeframes.

The statement is false because a resource's classification as renewable is based on its natural rate of reproduction or replenishment relative to human consumption. Since timber can be continuously regrown through natural ecological succession or planned afforestation, biomass remains a renewable resource.

Step-by-Step Solution

Define the geographical criterion for natural resource renewability

Renewability depends on whether a natural resource can naturally replenish or regenerate at a rate comparable to or faster than its rate of human consumption.

Establishing the scientific definition prevents confusion between individual unit consumption and continuous ecological availability.

Evaluate timber and organic biomass against this criterion

Forests and organic crops naturally regenerate through biological processes and human reforestation over short to medium timescales (years to decades).

Because replenishment occurs within human lifespans, the resource supply is continuous when managed sustainably.

Address the misconception regarding combustion

Chemical transformation or destruction of a single unit of wood during burning does not render the entire resource base non-renewable.

Renewability measures the capacity of the ecosystem to generate new stock, not the chemical reversibility of consumed fuel.

Key Concept

Resource Renewability and Replenishment Rates

Question 12271Question →

During a pedological survey of the middle belt region of Nigeria, soil profile pits over crystalline basement rocks reveal reddish-brown sandy-clay subsoils underlain by an impermeable, iron-rich indurated layer. Following clear-cutting of Guinea savanna vegetation, intense seasonal drying has accelerated surface crusting and sheet wash. Which combination of soil process and management practice is most appropriate for restoring productivity to this soil type?

Process: Ferruginization and hardpan crusting due to desiccation; Management: Application of cover cropping and organic mulching to retain moisture and restore soil aggregate stability.

Process: Podzolization driven by low temperatures; Management: Application of heavy chemical fertilizers to replace leached bases.

Process: Mass wasting down gentle slopes via solifluction; Management: Construction of concrete retaining walls along field boundaries.

Process: Marine siltation and salt-crust accumulation; Management: Mandatory bush burning prior to planting to flush excess minerals.

Show answer & explanation

Answer: Process: Ferruginization and hardpan crusting due to desiccation; Management: Application of cover cropping and organic mulching to retain moisture and restore soil aggregate stability.

Answer

Process: Ferruginization and hardpan crusting due to desiccation; Management: Application of cover cropping and organic mulching to retain moisture and restore soil aggregate stability.

Ferruginous tropical soils in Nigeria's middle belt develop over crystalline basement rocks. Removing vegetation cover exposes iron oxides to alternating wet and dry seasons, baking the soil into an indurated hardpan crust. Cover cropping and organic mulching shield the soil from direct solar radiation and rainfall kinetic energy, preserving soil moisture and aggregate stability.

Step-by-Step Solution

Identify the pedological profile and environmental context.

The soil profile describes Ferruginous tropical soils formed over crystalline basement complex rocks in Nigeria's middle belt (Guinea savanna zone).

Ferruginous soils are rich in iron oxides and feature sandy-clay horizons prone to induration upon desiccation.

Analyze the degradation mechanism triggered by vegetation removal.

Clearing vegetation exposes the iron-rich subsoil to alternating intense wet and dry seasons, causing thermal baking, surface crusting, and subsurface hardpan formation.

Direct exposure accelerates iron oxide oxidation and desiccation, forming an impermeable crust that reduces water infiltration.

Determine the effective soil conservation strategy.

Cover cropping and organic mulching protect topsoil from direct solar radiation and raindrop impact while building organic structure.

Biological soil conservation methods improve moisture retention and soil structure without disturbing fragile subsoil horizons.

Key Concept

Ferruginous Tropical Soil Degradation and Conservation in Nigeria

Question 12272Question →

Which of the following conditions represents a push factor responsible for driving rural-to-urban population migration in West Africa?

Persistent crop failure and severe depletion of soil fertility in agrarian villages

Availability of modern healthcare facilities and tertiary educational institutions in cities

Expansion of industrial manufacturing jobs and commercial activities in urban centers

Formation of linear settlement patterns along major transportation corridors

Show answer & explanation

Answer: Persistent crop failure and severe depletion of soil fertility in agrarian villages

Answer

Persistent crop failure and severe depletion of soil fertility in agrarian villages

Persistent crop failure and soil fertility depletion are adverse agricultural conditions operating at the point of origin. These hardships compel rural populations to abandon their farms and migrate, making them classic push factors.

Step-by-Step Solution

Distinguish between migration push factors and pull factors.

Push factors are unfavorable socio-economic or environmental conditions at the origin that compel people to leave, whereas pull factors are attractive features at the destination that draw migrants.

Correctly classifying geographic migration drivers requires identifying whether a factor originates at the source or the destination.

Evaluate the given options against the definition of a push factor.

Persistent crop failure and soil degradation represent adverse environmental and economic hardship at the rural origin, forcing individuals to relocate.

Declining agricultural productivity directly threatens rural livelihoods, creating a classic push mechanism.

Key Concept

Push and Pull Factors in Population Migration

Question 12273Question →

On 31st December 2025, the Kano Branch Current Account in the Head Office ledger of Zenith Commercial Ventures showed a debit balance of $\text{₦}250,000$ . On the same date, the Head Office Current Account in the Kano Branch ledger showed a credit balance of $\text{₦}195,000$ .

Upon reconciliation, the following timing differences were discovered:
1. Goods worth $\text{₦}35,000$ dispatched by the Head Office to Kano Branch on 28th December 2025 were not received by the branch until 4th January 2026.
2. Cash remittance of $\text{₦}20,000$ sent by Kano Branch to the Head Office on 30th December 2025 was received by the Head Office on 5th January 2026.

What is the true reconciled balance of the inter-entity current account as at 31st December 2025?

Show answer & explanation

Answer: 230000

Answer

The true reconciled inter-entity current account balance as at 31st December 2025 is

\text{₦}230,000

To calculate the true reconciled balance, adjust both books for unrecorded timing differences. The Head Office ledger shows a debit balance of

\text{₦}250,000

; crediting this account for cash in transit of

\text{₦}20,000

yields

\text{₦}230,000

. Simultaneously, the Branch ledger shows a credit balance of

\text{₦}195,000

; crediting this account for goods in transit of

\text{₦}35,000

yields

\text{₦}230,000

. Both sets of books reconcile to

\text{₦}230,000

Step-by-Step Solution

Identify the unadjusted ledger balances in both books

Head Office ledger (Branch Current Account): Debit balance of

\text{₦}250,000

. Branch ledger (Head Office Current Account): Credit balance of

\text{₦}195,000

Before reconciliation, timing differences cause discrepancies between inter-entity balances.

Adjust the Head Office books for Cash in Transit

Deduct Cash in Transit (

\text{₦}20,000

) from the Branch Current Account debit balance:

\text{₦}250,000 - \text{₦}20,000 = \text{₦}230,000

debit.

The Head Office has not yet credited the Branch Current Account for cash remitted by the branch.

Adjust the Branch books for Goods in Transit

Add Goods in Transit (

\text{₦}35,000

) to the Head Office Current Account credit balance:

\text{₦}195,000 + \text{₦}35,000 = \text{₦}230,000

credit.

The branch has not yet credited the Head Office Current Account for goods dispatched by the head office.

Key Concept

Head Office and Independent Branch Inter-Entity Current Account Reconciliation

Estimated Time:1m 30s

Question 12274Question →

An environmental researcher observes a distinct vegetation belt in West and Central Africa situated between the dense equatorial rainforest to the south and the dry Sudan Savanna to the north. This zone receives an annual rainfall of about 1,000 mm to 1,500 mm and is characterized by tall grasses and scattered deciduous, fire-resistant trees such as the baobab and locust bean. Which major African vegetation zone is being described?

Guinea Savanna

Sahel Savanna

Tropical Rainforest

Mediterranean Vegetation

Show answer & explanation

Answer: Guinea Savanna

Answer

Guinea Savanna

The Guinea Savanna (also known as the Moist Savanna) forms a broad transitional belt directly north of the tropical rainforest. It receives between 1,000 mm and 1,500 mm of annual rainfall and features continuous tall grass cover interspersed with fire-resistant, drought-deciduous trees such as the baobab, locust bean, and shea butter tree.

Step-by-Step Solution

Analyze the spatial location given in the stem.

The zone lies between the equatorial rainforest to the south and the drier savanna/Sahel to the north.

Vegetation belts in West and Central Africa follow a latitudinal zonation aligned with decreasing rainfall northward from the Equator.

Evaluate the vegetation characteristics described.

Tall grasses combined with fire-resistant deciduous trees (baobab, shea butter, locust bean) indicate a moist savanna environment.

Annual rainfall of 1,000–1,500 mm produces a longer dry season than the rainforest but far more moisture than the Sahel or desert zones.

Match the location and vegetation characteristics to the correct African vegetation zone.

The zone is identified as the Guinea Savanna.

The Guinea Savanna (Moist Savanna) is the broadest vegetation belt immediately north of the rainforest zone.

Key Concept

Major Vegetation Zones of Africa

Question 12275Question →

In urban geography models applied to rapidly growing metropolitan areas in developing nations, high-density informal settlements frequently form along flood-prone transport bypass routes and industrial peripheries rather than near the urban core. Which structural urban dynamic best explains this spatial settlement pattern?

High land values and formal commercial competition in the city center force low-income rural-urban migrants to occupy precarious, low-rent marginal land on the periphery.

Strong rural pull factors attract low-income urban workers outward to peripheral zones where municipal tax incentives and agricultural subsidies are highest.

Standard concentric expansion automatically converts peripheral transport corridors into nucleated, low-density high-income suburban enclaves.

A shrinking ratio of working-age residents to economic dependents decreases central housing demand, causing formal business districts to relocate to peripheral slums.

Show answer & explanation

Answer: High land values and formal commercial competition in the city center force low-income rural-urban migrants to occupy precarious, low-rent marginal land on the periphery.

Answer

High land values and formal commercial competition in the city center force low-income rural-urban migrants to occupy precarious, low-rent marginal land on the periphery.

In rapidly growing cities of developing nations, central urban land is subject to intense commercial competition and high bid-rent values. Unplanned influxes of low-income migrants cannot afford formal housing near the urban center, forcing them to settle informally on low-value, high-risk marginal lands (such as floodplains and transport bypass margins) on the urban periphery.

Step-by-Step Solution

Analyze the spatial pattern described in the stem.

Informal high-density settlements are located at industrial peripheries and hazardous lands along bypasses, far from the Central Business District (CBD).

Understanding the physical location of informal settlements helps identify the economic and spatial constraints behind urban land use.

Apply economic land-use principles (bid-rent and urban land market theories).

Central urban land commands high ground rent due to accessibility and commercial demand, pricing out low-income migrants.

Land values decrease with distance from the CBD, but low-income groups are forced onto marginal, hazardous land (peripheries, floodplains) where formal property rights are weak or un-enforced.

Evaluate the distractors against urban geography concepts and error patterns.

Reject options that misattribute the pattern to rural pull factors, misidentify informal linear sprawl as planned nucleated suburbs, or invert demographic dependency dynamics.

Eliminating conceptual misconceptions confirms that economic exclusion and land market price dynamics drive peripheral informal settlement creation.

Key Concept

Bid-Rent Theory and Spatial Segregation in Developing World Urbanization

Estimated Time:2m 0s

Question 12276Question →

During a field study on urban growth in West Africa, students observed that severe drought and a lack of job opportunities in farming villages forced many young adults to relocate to the capital city. Which type of migration factor is represented by these rural conditions?

Push factors, because they are adverse conditions at the place of origin that force residents to move away.

Pull factors, because unfavorable conditions at the place of origin attract migrants toward urban centers.

Linear settlement factors, because rural migrants consistently move in continuous lines along highway corridors.

Dependency ratio factors, because the movement of young adults inverts the proportion of working-age residents in cities.

Show answer & explanation

Answer: Push factors, because they are adverse conditions at the place of origin that force residents to move away.

Answer

Push factors, because they are adverse conditions at the place of origin that force residents to move away.

Drought, soil degradation, and unemployment at the place of origin are classic push factors because they exert pressure on rural residents to leave their homes in search of better living conditions.

Step-by-Step Solution

Analyze the conditions described in the stem

Drought and lack of rural employment are unfavorable conditions existing at the migrants' village of origin.

Identifying whether the condition exists at the origin or destination is the key to distinguishing push from pull factors.

Classify the migration driver based on demographic definitions

Unfavorable origin conditions that compel people to leave rural areas are classified as push factors.

Push factors drive people away from a location, while pull factors attract them to a new location.

Key Concept

Rural Push Factors in Urbanization

Question 12277Question →

In the crystalline Basement Complex terrain of Southwestern Nigeria, soil characteristics vary systematically along a hillslope profile (soil catena). Arrange the following soil types/zones in the correct order from the hilltop (summit) down to the valley bottom.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct catenary sequence from hill crest to valley bottom is: Shallow lithosols on crests → Deep reddish Ferruginous soils on upper slopes → Colluvial soils on lower pediment slopes → Hydromorphic clay soils (Fadama) on the valley floor.

In Nigerian Basement Complex landscapes, relief dictates drainage, soil depth, and moisture regimes along a catenary gradient. The sequence begins at the crest with shallow lithosols due to runoff, moves to well-drained deep Ferruginous soils on upper pediment slopes, transitions to colluvial deposits on lower slopes, and terminates in waterlogged hydromorphic clay soils in valley bottoms.

Step-by-Step Solution

Identify the soil condition at the highest elevation (summit/crest)

Hill crests experience rapid erosion and high runoff, leaving shallow, rocky skeletal soils (lithosols).

Topographic position governs weathering duration and erosion rates along a catena.

Determine soil development on the upper pediment slope

Upper pediment slopes feature deep, well-aerated, reddish Ferruginous tropical soils.

Good drainage and slope stability favor deep profile development and iron oxide accumulation.

Trace soil particle movement to the lower pediment slope

Lower slopes collect hill-wash debris, producing colluvial soils of medium texture.

Overland flow and gravity transport colluvial material down to gentle lower gradients.

Identify the soil type occupying the valley depression

Valley floors accumulate drainage water, giving rise to waterlogged hydromorphic (Fadama) clay soils.

High water tables and anaerobic conditions cause gleying in low-lying alluvial depressions.

Key Concept

Soil Catena and Topographic Control on Nigerian Soil Distribution

Estimated Time:2m 0s

Question 12278Question →

According to the IFAC and ICAN Codes of Ethics for Professional Accountants, a professional accountant in business is ethically permitted to misstate financial figures if refusing a supervisor's direct order would result in immediate loss of employment.

True

False

Show answer & explanation

Answer: False

Answer

The statement is False. Threats of dismissal or employer coercion do not exempt a professional accountant from upholding core ethical principles such as integrity and objectivity.

The statement is false because ICAN and IFAC fundamental principles explicitly state that accountants must maintain integrity and objectivity even when facing intimidation threats like termination of employment.

Step-by-Step Solution

Identify the ethical issue and threat type described in the stem.

The situation involves an intimidation threat (fear of losing employment) aimed at forcing the accountant to compromise financial integrity.

Understanding the nature of the threat helps determine the appropriate professional conduct required under ethical codes.

Evaluate the hierarchy of professional duty versus employer directives.

Professional ethical duties owed by an accountant strictly supersede workplace directives that require illegal or unethical reporting.

The fundamental principles of Integrity and Objectivity require accountants to be honest and free from undue influence, regardless of personal consequences such as job loss.

Key Concept

Intimidation Threat and Professional Integrity in Accounting

Question 12279Question →

Match each physical geography process in Column A with its correct defining characteristic or mechanism in Column B.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Carbonation matches chemical dissolution of limestone by carbonic acid; Exfoliation matches physical peeling of outer rock layers; Soil Creep matches extremely slow downslope soil movement under gravity; Rockfall matches rapid free-fall of detached rock fragments.

Carbonation is matched with chemical dissolution because carbonic acid reacts with limestone. Exfoliation matches the peeling of rock sheets caused by differential expansion and pressure release. Soil Creep matches slow, continuous soil movement downslope. Rockfall matches fast, gravity-driven free-falling of rock debris down steep slopes.

Step-by-Step Solution

Distinguish between weathering processes (in-situ rock breakdown) and mass wasting processes (downslope displacement under gravity).

Carbonation and Exfoliation are weathering processes, whereas Soil Creep and Rockfall are mass wasting processes.

Categorizing by fundamental mechanism simplifies pairing.

Identify the chemical versus physical nature of the weathering processes.

Carbonation involves chemical dissolution of limestone, while Exfoliation is physical onion-skin peeling of rock layers.

Chemical weathering alters mineral composition, while physical weathering breaks rocks mechanically.

Differentiate the mass wasting processes by rate of movement.

Soil Creep represents the slowest movement of surface soil, whereas Rockfall represents a rapid, direct vertical fall of rocks.

Mass wasting phenomena are categorized primarily by movement speed and material state.

Key Concept

Classification and mechanisms of weathering and mass wasting processes.

Question 12280Question →

The Jos Plateau functions as Nigeria's principal hydrographic center, exhibiting a centrifugal (radial) drainage network due to its elevated elevation and dome-like structure. Which of the following options correctly identifies three rivers originating from this highland together with their respective ultimate drainage basins?

River Kaduna flowing southwest into the River Niger basin, River Gongola flowing southeast into the River Benue basin, and River Hadejia flowing northeast into the Lake Chad basin

River Sokoto flowing south into the Niger Delta, River Cross flowing north into the Benue Trough, and River Ogun flowing east into Lake Chad

River Osun flowing north into the Hawal Basin, River Rima flowing east into the Gongola Basin, and River Katsina-Ala flowing west into the Atlantic Ocean

River Niger flowing northeast onto the Jos Plateau, River Benue flowing northwest into the Sokoto Plains, and River Anambra flowing north into the Lake Chad Basin

Show answer & explanation

Answer: River Kaduna flowing southwest into the River Niger basin, River Gongola flowing southeast into the River Benue basin, and River Hadejia flowing northeast into the Lake Chad basin

Answer

River Kaduna flowing southwest into the River Niger basin, River Gongola flowing southeast into the River Benue basin, and River Hadejia flowing northeast into the Lake Chad basin

The Jos Plateau serves as Nigeria's central hydrological divide. Due to its elevated dome structure, rivers radiate outwards in a centrifugal pattern: the River Kaduna flows southwest toward the River Niger, the River Gongola flows southeast toward the River Benue, and rivers such as the Hadejia and Delimi flow northeast toward the Lake Chad inland drainage basin.

Step-by-Step Solution

Identify the physical highland region and its drainage characteristic

The Jos Plateau is a elevated crystalline horst forming Nigeria's primary hydrological node, creating a radial (centrifugal) drainage pattern where rivers radiate outward in all directions.

Topographic elevation determines the flow direction of rivers moving away from a central high point.

Trace the major river systems radiating from the Jos Plateau to their respective drainage destinations

The Kaduna River drains southwest into the River Niger; the Gongola River drains southeast into the River Benue; and the Hadejia/Jama'are system drains northeast into the Lake Chad interior basin.

Topographic slope directs rivers into three distinct drainage basins of Nigeria: the Niger Basin, Benue Basin, and Chad Basin.

Evaluate the choices to select the correctly matched rivers and basins

The option specifying Kaduna (Niger Basin), Gongola (Benue Basin), and Hadejia (Lake Chad Basin) correctly matches all three radial drainage directions.

It accurately reflects the geographical courses and receiving basins of rivers originating on the Jos Plateau.

Key Concept

Radial Drainage Pattern of the Jos Plateau

Estimated Time:2m 0s

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