Examkin

Tüm alıştırma soruları

631 soru

Tüm türler13,931Çoktan seçmeli7,139Doğru / Yanlış771Sayısal1,526Eşleştirme2,583Sıralama631Boşluk doldurma1,223Kısa cevap58
Soru 581Soru →

Over geological time, animal respiratory systems evolved structural adaptations to meet increasing metabolic demands and facilitate the transition from aquatic to terrestrial environments. Arrange the following respiratory mechanisms in order of their evolutionary complexity, starting from the most primitive method to the most advanced terrestrial adaptation.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct evolutionary sequence of respiratory mechanisms from most primitive to most advanced is: Direct cutaneous diffusion across a moist body surface → Filamentous vascularized gills → Simple sac-like lungs supplemented by skin → Highly compartmentalized lungs containing dense alveolar networks.
The evolutionary trend in animal respiratory systems progresses from simple diffusion across unspecialized body surfaces (in primitive aquatic organisms) to specialized external/internal gills (in aquatic invertebrates and fish), followed by simple sac-like lungs requiring cutaneous assistance (in amphibians transitioning to land), and culminates in highly compartmentalized alveolar lungs (in advanced terrestrial homoiotherms).

Adım Adım Çözüm

1
Identify the baseline primitive state of gas exchange in animals.
Direct cutaneous diffusion across the cell membrane or general body surface requires no specialized tissue and is characteristic of lower invertebrates.
Evolutionary trends begin with unspecialized body surfaces before true organ systems evolved.
2
Determine the specialized aquatic respiratory adaptation.
Filamentous gills evolved as specialized, highly folded vascular structures to extract dissolved oxygen in aquatic vertebrates and higher invertebrates.
Gills represent organ-level specialization in aquatic habitats prior to land colonization.
3
Identify the early primitive terrestrial respiratory adaptation.
Simple sac-like lungs represent an intermediate evolutionary stage seen in early land dwellers like amphibians, which still rely partly on cutaneous respiration.
Primitive lungs had minimal folding and surface area, necessitating supplementary cutaneous gas exchange.
4
Identify the most complex, specialized terrestrial respiratory adaptation.
Compartmentalized lungs filled with microscopic alveoli provide vast internal surface area for high metabolic demands in advanced endothermic land vertebrates.
Alveoli represent the apex of respiratory structural evolution, allowing efficient gas exchange while preventing body desiccation.

Anahtar Kavram

Evolutionary progression of respiratory systems in animals from simple diffusion to specialized internal alveolar structures.
Soru 582Soru →

What is the correct chronological sequence of steps involved in the industrial extraction of sodium metal using the Downs process, from raw material preparation to the final collection of the metallic product?

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence begins with purifying and drying rock salt to yield anhydrous NaClNaCl, followed by mixing in CaCl2CaCl_2 to lower the fusion temperature. The mixture is then melted and electrolyzed in the Downs cell, leading to the reduction of Na+Na^+ at the cathode, and finally collecting liquid sodium as it floats to the top of the molten electrolyte.
The industrial extraction of sodium metal via the Downs process requires a strict sequence: raw rock salt is first purified and dried to remove water, then mixed with CaCl2CaCl_2 flux to lower the melting point to about 600∘C600^\circ\text{C}. This solid mixture is melted in the cell, where direct current electrolyzes the melt, reducing Na+Na^+ at the iron cathode. Finally, the buoyant molten sodium rises to the top of the cathode chamber and is harvested in a nitrogen environment.

Adım Adım Çözüm

1
Identify raw material pretreatment
Anhydrous NaClNaCl is prepared by removing moisture and impurities.
Water must be completely eliminated to prevent hydrogen discharge and hazardous reactions with sodium metal.
2
Identify flux addition step
CaCl2CaCl_2 is added to form a binary eutectic mixture.
Lowering the melting point from 801∘C801^\circ\text{C} to approximately 600∘C600^\circ\text{C} reduces operating costs and sodium vaporization.
3
Identify electrolytic cell setup and power application
The mixture is fused and direct current is passed through molten NaClNaCl/CaCl2CaCl_2.
Electrolysis requires mobile ions in a molten state to conduct electricity.
4
Identify electrode reactions
Reduction: Na++e−→Na(l)Na^+ + e^- \rightarrow Na(l) at cathode; Oxidation: 2Cl−→Cl2(g)+2e−2Cl^- \rightarrow Cl_2(g) + 2e^- at anode.
Na+Na^+ ions migrate to the iron cathode and accept electrons, while Cl−Cl^- ions migrate to the graphite anode.
5
Identify product separation and harvest
Molten sodium metal floats above the dense molten electrolyte into a collection riser.
The lower density of molten sodium (0.97 g/cm30.97\text{ g/cm}^3) relative to molten electrolyte (2.1 g/cm32.1\text{ g/cm}^3) allows passive buoyancy separation.

Anahtar Kavram

Downs Process for Sodium Extraction
Tahmini Süre:1m 30s
Soru 583Soru →

Arrange the following structural body plans of animals in order of increasing evolutionary complexity, from the most primitive organization to the most advanced.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct evolutionary sequence of animal body plans from primitive to advanced is: Diploblastic body plan with two germ layers and radial symmetry → Triploblastic acoelomate body plan with bilateral symmetry but no internal body cavity → Triploblastic pseudocoelomate body plan with a body cavity partially lined by mesoderm → Triploblastic coelomate body plan with a true body cavity completely lined by mesodermal epithelium.
The correct order reflects the fundamental evolutionary sequence of animal organization: primitive radial diploblastic forms evolved first, followed by bilateral triploblastic acoelomates, then pseudocoelomates with a persistent blastocoel, and finally coelomates possessing a peritoneum-lined true coelom.

Adım Adım Çözüm

1
Identify the germ layer organization and symmetry of primitive multicellular animals.
Diploblastic animals possessing two germ layers (ectoderm and endoderm) with radial symmetry evolved first among tissue-grade organisms.
Radial diploblastic body plans preceded the development of mesoderm and bilateral symmetry.
2
Determine the emergence of the third germ layer (mesoderm) and bilateral symmetry without a body cavity.
Triploblastic acoelomate organization evolved next, introducing a middle germ layer (mesoderm) and cephalization, but remaining solid between digestive tract and body wall.
Acoelomates represent the first triploblastic lineage prior to body cavity formation.
3
Distinguish between false body cavity (pseudocoelom) and true body cavity (coelom) evolution.
Pseudocoelomates evolved a cavity derived from the blastocoel, followed by coelomates where mesoderm fully lines the cavity to form a peritoneum.
A true coelom allows complex organ suspensions and muscularized digestive tracts.

Anahtar Kavram

Evolutionary progression of germ layers, body symmetry, and body cavity organization in animals
Tahmini Süre:1m 0s
Soru 584Soru →

Arrange the following organic compounds in order of INCREASING solubility in water, starting with the least soluble compound:

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence from least soluble to most soluble in water is: Pentane, Pentan-1-ol, Butane-1,4-diol, Ethane-1,2-diol.
Water solubility in organic compounds is determined by the balance between hydrophilic (water-attracting) functional groups and hydrophobic (water-repelling) carbon chains. Pentane is non-polar and cannot form hydrogen bonds, making it the least soluble. Pentan-1-ol has one −OH-\text{OH} group but a large 5-carbon hydrophobic chain, giving it low solubility. Butane-1,4-diol contains two −OH-\text{OH} groups, significantly enhancing hydrogen bonding with water molecules. Ethane-1,2-diol has two −OH-\text{OH} groups and the shortest hydrophobic carbon chain (2 carbons), making it the most soluble in water.

Adım Adım Çözüm

1
Analyze the functional groups present in each compound.
Pentane has no polar functional groups. Pentan-1-ol has one −OH-\text{OH} group. Butane-1,4-diol has two −OH-\text{OH} groups. Ethane-1,2-diol has two −OH-\text{OH} groups.
Water is a polar solvent that dissolves compounds capable of forming hydrogen bonds through polar functional groups like −OH-\text{OH}.
2
Compare the hydrophobic alkyl chain lengths for compounds with the same functional group capability.
Ethane-1,2-diol has a smaller non-polar carbon chain (2 carbons) compared to Butane-1,4-diol (4 carbons).
A larger non-polar alkyl region increases hydrophobic interaction, reducing solubility in water.
3
Establish the complete order of increasing solubility.
Pentane < Pentan-1-ol < Butane-1,4-diol < Ethane-1,2-diol.
Solubility increases with an increasing ratio of hydrophilic functional groups (−OH-\text{OH}) to non-polar alkyl chain length.

Anahtar Kavram

Solubility of organic compounds based on functional group polarity and hydrophobic alkyl chain length
Soru 585Soru →

Organize the following structures of the earthworm's (Annelida) digestive tract in the correct sequential order through which ingested organic matter passes.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence of structures through which food moves in an earthworm's alimentary canal is: Muscular pharynx, Thin-walled crop, Thick-walled gizzard, and Long intestine.
In earthworms (phylum Annelida), the digestive pathway follows a specific anteroposterior sequence: swallowed food passes through the pharynx and esophagus into the crop for storage, then into the gizzard for mechanical trituration, and finally into the intestine where chemical digestion and nutrient absorption take place.

Adım Adım Çözüm

1
Identify the initial organ of ingestion following the mouth.
Organic material and soil are pulled in by the muscular pharynx.
The pharynx creates suction to ingest soil and organic particles.
2
Identify the organ used for temporary food storage.
Ingested material travels down the esophagus into the crop.
The thin-walled crop holds food temporarily before mechanical digestion.
3
Determine the organ responsible for mechanical grinding.
Food moves from the crop into the gizzard.
The muscular gizzard uses ingested mineral grains to grind food into small particles.
4
Identify the final site of enzymatic digestion and absorption.
Pulverized food enters the long intestine.
Enzymatic digestion and nutrient absorption occur across the intestinal epithelium before undigested waste exits the anus.

Anahtar Kavram

Annelid Alimentary Canal Structural Sequence
Tahmini Süre:1m 0s
Soru 586Soru →

A rational student operating under a tight budget constraint needs to construct a scale of preference to allocate a limited monthly allowance of N25,000\text{N}25,000. Arrange the following competing items in descending order of priority (from top priority to lowest priority) according to the economic principles governing a scale of preference.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct order from top priority to lowest priority is: 1. Daily basic nutritional food expenses required for physical sustenance during the academic session, 2. Mandatory course textbooks required for passing upcoming continuous assessment examinations, 3. Subscription for a monthly high-speed internet data plan used for general research and communication, 4. Purchase of high-end designer apparel for an optional end-of-term campus party.
A scale of preference is a list of unsatisfied wants arranged in order of relative importance and urgency. A rational consumer prioritizes essential survival needs (food) first, followed by critical functional needs (mandatory textbooks), secondary comforts (internet subscription), and lastly luxury or non-essential items (designer party apparel).

Adım Adım Çözüm

1
Identify primary basic survival needs
Daily nutritional food expenses represent indispensable physiological needs.
Economic rationality dictates that physiological survival needs must be satisfied before any higher-level or secondary wants.
2
Identify primary functional and urgent obligations
Mandatory course textbooks required for upcoming exams rank second.
Textbooks represent urgent functional wants directly aligned with the student's core objective of academic performance.
3
Identify secondary comforts and utility-enhancing items
Monthly high-speed internet data plan ranks third.
General communication and research data plans provide secondary utility and comfort, ranking below mandatory academic materials.
4
Identify non-essential luxuries
Designer apparel for an optional social party ranks last.
Luxury goods and social leisure wants carry low marginal utility relative to cost under strict budget constraints.

Anahtar Kavram

Scale of Preference
Soru 587Soru →

Heavy metal contamination in aquatic environments can cause severe ecological damage through bioamplification across food webs. Arrange the following sequential processes involved in methylmercury poisoning in an aquatic ecosystem in the correct order, from the initial waste release to the ultimate biological impact on apex consumers.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct ecological sequence begins with industrial inorganic mercury discharge, followed by bacterial transformation into organic methylmercury, absorption by phytoplankton, biomagnification across consumer trophic levels, and ultimate neurological toxicity in apex predators.
Heavy metal pollution biomagnifies sequentially: industrial effluent releases inorganic mercury into water, benthic anaerobic bacteria methylate it into organic methylmercury, phytoplankton absorb the lipid-soluble toxin, consuming organisms biomagnify the concentration at each trophic step, and top predators reach lethal toxic thresholds resulting in severe neurological damage.

Adım Adım Çözüm

1
Identify the initial source of environmental pollution
Industrial discharge releases inorganic mercury into the aquatic habitat.
Pollution processes commence with the introduction of toxic effluents into an ecosystem.
2
Trace the microbial modification of the pollutant
Anaerobic sediment bacteria metabolize inorganic mercury into organic methylmercury.
Methylation turns inorganic mercury into a bioavailable, fat-soluble compound capable of crossing cell membranes.
3
Determine primary producer bioaccumulation
Phytoplankton absorb methylmercury from surrounding water.
Autotrophic primary producers uptake dissolved contaminants, bringing them into the living food chain.
4
Analyze trophic transfer and concentration increase
Methylmercury biomagnifies progressively through successive consumer trophic levels.
Higher-level consumers consume multiple contaminated organisms over their lifespan without metabolic excretion of heavy metals.
5
Identify the final physiological impact
Apex predators experience acute neurotoxicity and reproductive failure.
Organisms at the top of the ecological pyramid accumulate the highest tissue concentration of persistent pollutants.

Anahtar Kavram

Biomagnification of Heavy Metals in Aquatic Food Webs
Soru 588Soru →

Arrange the following procedural steps involved in the formal retirement of a general partner in a commercial firm into their correct chronological order, from first to last.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct chronological sequence for partner retirement begins with serving formal notice to existing partners, followed by revaluing firm assets and liabilities, discharging the financial entitlements (capital, reserves, goodwill), and concluding with issuing public notice in national newspapers to avoid third-party liability by estoppel.
The formal retirement of a partner follows a strict legal and accounting sequence: first, serving written notice of retirement to co-partners; second, revaluing assets and liabilities to close accounts; third, paying out the outgoing partner's capital, reserves, and goodwill; and finally, issuing a public notice in national newspapers to protect the retired partner from subsequent firm liabilities under holding out.

Adım Adım Çözüm

1
Identify the initial legal requirement to trigger retirement.
Serving formal notice of intention to retire to all existing partners.
Retirement cannot proceed legally without prior formal notification to co-partners according to the partnership deed.
2
Determine the internal accounting step following notice.
Revaluing partnership assets and liabilities.
Accounts must be reconciled up to the effective date of retirement to determine unrecorded gains or losses.
3
Identify the settlement of accounts step.
Discharging financial entitlements regarding capital, reserves, and goodwill.
The outgoing partner's total financial interest must be settled or converted into a loan account.
4
Identify the legal protection step against future debts.
Publishing public notice of retirement in the official Gazette or national newspapers.
Without public notice, the retired partner remains liable to third parties who continue dealing with the firm under the doctrine of holding out (estoppel).

Anahtar Kavram

Procedural steps and legal liabilities in partner retirement
Soru 589Soru →

Arrange the following steps and anatomical structures in the correct sequence through which water and trapped nutrients travel during filter feeding in a bivalve mollusc, from initial entry to ingestion.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequential order of filter feeding in bivalves is: Incurrent siphon entry → Ctenidia trapping food → Labial palp sorting → Mouth ingestion → Excurrent siphon expulsion.
In bivalve molluscs (such as mussels and clams), filter feeding follows a continuous path: water enters through the incurrent siphon, passes over the ctenidia (gills) where food particles become trapped in mucus, moves to the labial palps for mechanical sorting, enters the mouth for digestion, and filtered water exits via the excurrent siphon.

Adım Adım Çözüm

1
Identify the entry point of water into the bivalve mantle cavity.
Water enters through the incurrent siphon.
The incurrent siphon brings fresh oxygenated water and planktonic nutrients into the body.
2
Determine the site of particle capture.
Water passes over the ctenidia (gills) where cilia trap particles in mucus.
Ctenidia act as biological filters using ciliary action.
3
Determine how trapped food is sorted.
Labial palps sort digestible food from inorganic material.
Labial palps prevent ingestion of inedible silt or heavy debris.
4
Trace the movement of sorted food into the gut.
Selected edible material passes into the mouth.
The mouth receives sorted nutrients from the palps for chemical digestion.
5
Identify the exit pathway of filtered water.
Excurrent siphon releases filtered water and waste outside the body.
A continuous one-way flow maintains respiratory efficiency and waste removal.

Anahtar Kavram

Bivalve Filter Feeding Mechanism
Soru 590Soru →

During the physical distribution of manufactured consumer goods, a merchant wholesaler performs several sequential operational activities. Arrange the following functions performed by the merchant wholesaler in the correct chronological order, from initial product procurement to final retail dispatch.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct operational sequence of the merchant wholesaler is: (1) Procuring goods in bulk quantities directly from the manufacturer and storing them in central warehouses, (2) Sorting, grading, and standardizing the stored merchandise according to quality and specifications, (3) Breaking bulk by dividing large consignments into smaller, manageable commercial units, and (4) Dispatching and delivering the repackaged units to individual retail outlets.
The merchant wholesaler's process logically begins with bulk acquisition and storage from the manufacturer. Next, the wholesaler sorts and grades the inventory to ensure quality consistency. Then, the wholesaler performs the essential service of breaking bulk into smaller lots. Finally, the wholesaler transports and delivers these smaller packages to retailers.

Adım Adım Çözüm

1
Identify the primary entry point of goods into the wholesale channel.
The wholesaler first purchases in large quantities from manufacturers and places them into warehouse storage.
Wholesalers act as primary bulk buyers before performing secondary processing activities.
2
Determine the processing step applied to bulk warehouse inventory.
Bulk inventory is sorted, graded, and standardized.
Products received from factories must be classified into uniform categories before being divided for buyers.
3
Identify the sub-division phase of distribution.
The wholesaler breaks bulk into smaller orders requested by retailers.
Retailers lack the capital and storage space for factory-sized lots, requiring breaking bulk after sorting.
4
Identify the final outbound logistical activity.
The smaller orders are dispatched and delivered to retail stores.
Transportation to retail premises is the final physical distribution step completed by the wholesaler.

Anahtar Kavram

Operational Sequence of Functions in Wholesale Trade
Soru 591Soru →

A large-scale commercial soap manufacturing factory in Kano operates a continuous assembly line based on division of labour. Arrange the following specialized operational tasks in their correct sequential order from raw material processing to finished commercial packaging.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence starts with blending raw materials in saponification vessels (item_1), followed by chilling and extruding into solid bars (item_2), cutting into standard tablets and stamping logos (item_3), and concludes with wrapping and packing into bulk cartons (item_4).
In a factory operating division of labour, tasks follow a strict technological order: raw material chemical transformation (saponification) must occur before physical shaping (extrusion), followed by unit sizing and branding (cutting/stamping), and concluding with commercial protection (packaging).

Adım Adım Çözüm

1
Identify the initial raw material input and primary transformation task in the division of labour system.
Blending raw fatty acids and caustic soda in saponification vessels represents the starting chemical reaction stage.
Production cannot proceed to shaping or packaging until the basic chemical compound is formed.
2
Determine the intermediate physical transformation stage.
Chilling liquid soap mass and extruding continuous solid bars follows chemical reaction.
Liquid base must be cooled and solidified into manageable bar forms before individual units can be processed.
3
Identify the unit-level finishing process.
Cutting continuous bars into tablet dimensions and stamping logos is the next logical operational task.
Mechanical sizing and branding occur on solid individual pieces prior to wrapping.
4
Identify the final auxiliary commercial preparation task.
Wrapping individual tablets and cartoning for wholesale distribution completes the assembly line process.
Packaging is the final stage that protects the finished commercial good for market distribution.

Anahtar Kavram

Sequential Division of Labour in Manufacturing
Soru 592Soru →

A civil servant receiving a fixed monthly salary constructs a scale of preference to allocate limited financial resources. Based on economic principles of urgency and relative importance of wants, arrange the following spending needs in order of priority from highest priority (most urgent) to lowest priority (least urgent).

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct order of priority from highest to lowest is: Purchase of essential food items for monthly household consumption, Payment of residential house rent due for the month, Payment of children's school tuition fees for the upcoming academic term, and Acquisition of a designer wristwatch for social events.
A scale of preference is a list of unsatisfied wants arranged in order of relative importance and urgency. A rational economic agent prioritizes basic physiological survival needs (food) first, followed by essential shelter (rent), critical family investments (education), and finally non-essential luxury goods (designer wristwatch).

Adım Adım Çözüm

1
Identify basic survival necessities
Essential food items are prioritized first because physical survival is the most urgent unsatisfied want.
Economic rationality dictates that basic physiological needs take precedence over all other expenditures on a scale of preference.
2
Identify shelter and housing obligations
Payment of residential house rent is placed second.
Basic shelter secures protection and stability, making it secondary only to immediate sustenance.
3
Identify important social and educational investments
School tuition fees are ranked third.
Tuition fees represent critical long-term developmental priorities, ranking ahead of optional luxury consumption.
4
Identify luxury and non-essential wants
The designer wristwatch is placed last.
Luxury goods yield non-essential satisfaction and are deferred when financial resources are limited.

Anahtar Kavram

Scale of Preference
Soru 593Soru →

A commercial poultry farmer operating under a strict budget constraint needs to construct a scale of preference to guide farm expenditure. Arrange the following financial needs in order of priority, from the most urgent (highest priority) to the least urgent (lowest priority).

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct priority sequence from most urgent to least urgent is: Purchasing essential livestock vaccines and feed, followed by Repairing damaged feeding troughs and water supply pipes, then Installing automated lighting timers, and finally Repainting the administrative office block and exterior boundary fence.
A rational economic producer constructs a scale of preference by arranging needs according to urgency and utility. Livestock feed and vaccines ensure immediate survival and prevent catastrophe, making them the most pressing need. Maintaining basic operational equipment like feeding troughs comes next to sustain production. Productivity-enhancing technologies like lighting timers follow as secondary growth objectives, while cosmetic items like office painting carry the lowest urgency.

Adım Adım Çözüm

1
Identify the primary function of a scale of preference.
A scale of preference ranks unsatisfied wants in order of importance and urgency to enable rational decision-making under scarcity.
Economic agents must satisfy basic survival and core operational needs before allocating scarce resources to capital enhancements or aesthetic luxuries.
2
Evaluate and rank each expenditure item based on urgency and necessity.
Essential feed and vaccines safeguard livestock survival (top priority). Repairing basic feeding equipment secures daily operations (second priority). Installing production-boosting lighting enhances yield (third priority). Office painting is purely cosmetic (lowest priority).
Ranking wants logically reflects the degree of urgency and opportunity cost involved in farm management.

Anahtar Kavram

Scale of Preference and Urgency of Wants
Soru 594Soru →

Over time, human societies evolved different forms of payment to facilitate trade and overcome the drawbacks of earlier media of exchange. Arrange the following forms of money in chronological order of their historical emergence in commerce, from the earliest to the most recent.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct chronological sequence of monetary emergence is commodity money, followed by metallic money, paper money, and finally electronic money.
Money evolved systematically to improve trade efficiency: starting with useful physical goods (commodity money), advancing to standardized metals (metallic money), shifting to paper claims backed by reserves (paper money), and ultimately evolving into computer-stored data (electronic money).

Adım Adım Çözüm

1
Identify the earliest medium of exchange introduced after barter.
Commodity money (items like salt or cowrie shells with intrinsic value) was adopted first.
Early commercial communities required a mutually acceptable physical item to resolve the double coincidence of wants inherent in barter.
2
Identify the medium that solved issues of commodity bulkiness and perishability.
Metallic money (stamped gold and silver coins) was introduced next.
Metals provided standardized purity, high durability, and portability relative to bulky commodities.
3
Determine the transition from physical precious metal circulation to paper representation.
Paper money developed through goldsmith receipts and bank certificates.
Traders deposited heavy metal coins with goldsmiths for safekeeping and began exchanging paper deposit receipts directly.
4
Identify the computer-based stage of payment evolution.
Electronic money is the final and most recent evolutionary phase.
Telecommunication networks and banking automation enabled instant, paperless credit transfers and digital monetary balances.

Anahtar Kavram

Historical evolution of forms of money
Soru 595Soru →

A commercial enterprise is converting its paper-based sales records into a computerized data processing system. Arrange the following end-to-end stages of the electronic data processing (EDP) cycle in their correct chronological sequence, from initial record origination to final record retention.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence of stages in the electronic data processing cycle is: (1) Capturing raw commercial transaction details on source documents, (2) Converting and transcribing source document entries into computer-readable digital format, (3) Performing automated validation checks, running calculations, and updating master business records, and (4) Generating financial management summary reports and writing encrypted backup archives to secure storage media.
The electronic data processing cycle strictly follows a logical four-phase progression: Data Origination/Collection (capturing raw sales receipts) → Data Input (converting source documents into digital form) → Data Processing (executing validation and updating master ledgers) → Data Output/Storage (producing summary reports and archiving to backup media).

Adım Adım Çözüm

1
Identify the initial origination stage of business records.
Capturing raw commercial transaction details on source documents must be placed first as data origination precedes all computerized activity.
Without raw transaction data captured on source documents, there is no input data available for electronic processing.
2
Identify the data entry/transcription stage.
Converting and transcribing source document entries into computer-readable digital format follows data collection.
Source records must be encoded or keyed into machine-readable format before the computer system can execute operations on them.
3
Identify the central processing stage.
Performing automated validation checks, running calculations, and updating master business records follows data input.
Once data is entered into the system, software algorithms process the inputs to alter and compute master file records.
4
Identify the final output and storage/archiving stage.
Generating financial management summary reports and writing encrypted backup archives to secure storage media completes the cycle.
Information outputs and permanent record retention occur after data has been fully processed and master files updated.

Anahtar Kavram

Electronic Data Processing (EDP) Cycle in Business Records Management
Tahmini Süre:2m 0s
Soru 596Soru →

In an enterprise's computerized business records system, commercial transactions must pass through distinct operations to maintain data integrity and auditability. Arrange the following data processing stages in the correct operational sequence, from initial transaction entry to long-term record preservation.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence for computerized data processing is: (1) Data Collection and Source Document Preparation, (2) Data Input Conversion and Validation, (3) Data Processing and Master File Updating, (4) Output Generation and Report Distribution, and (5) Storage and Archival Retention.
The correct operational sequence follows the standard Electronic Data Processing (EDP) workflow: Input (Data Collection and Validation) → Processing (Master File Updating) → Output (Report Generation) → Storage (Archival Retention). Capturing transaction data on source documents starts the cycle, which is followed by entry and edit validation checks to filter out errors. Validated inputs are then processed against master files, after which reporting outputs are produced, and finally, permanent records and logs are archived for audit compliance.

Adım Adım Çözüm

1
Identify the point of origin for business transaction data.
Recognize that data collection and source document preparation must occur first.
Computer systems cannot process data without initial data capture.
2
Determine the preparation required prior to computer calculations.
Place input conversion and error validation as the second stage.
Validation checks prevent inaccurate or corrupted data from entering the database (Garbage In, Garbage Out).
3
Identify the central computation activity.
Position data processing and master file updating third.
Validated transaction entries are applied against master files to calculate updated ledger values.
4
Locate the stage where processed information is presented to management.
Set output generation and report distribution as the fourth stage.
Outputs depend directly on the completion of the processing phase.
5
Determine the final stage for audit compliance and security.
Place storage and archival retention as the final stage.
Completed operational records must be backed up to preserve statutory audit trails and ensure disaster recovery.

Anahtar Kavram

Electronic Data Processing (EDP) Cycle in Business Records Management
Soru 597Soru →

Arrange the following commercial entities in the correct sequential order of a traditional four-stage channel of distribution, starting from origin to final usage.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence from point of production to final consumption is Manufacturer → Wholesaler → Retailer → Consumer.
In a traditional long distribution channel, physical movement and ownership pass sequentially from the Manufacturer (producer) to the Wholesaler (bulk buyer), then to the Retailer (unit retailer), and finally to the Consumer (end user).

Adım Adım Çözüm

1
Identify the primary source of production in the distribution channel.
The Manufacturer is the first stage in the channel.
Production of goods must occur before physical distribution can begin.
2
Determine the commercial intermediary that purchases directly from the producer in bulk.
The Wholesaler follows the Manufacturer.
Wholesalers buy large quantities directly from manufacturers and store them in warehouses.
3
Identify the intermediary that breaks bulk down to unit quantities for end-users.
The Retailer follows the Wholesaler.
Retailers obtain smaller stock lots from wholesalers to stock retail shops convenient for buyers.
4
Identify the final destination of the distributed goods.
The Consumer completes the channel.
The ultimate consumer buys individual units from retailers for personal use, concluding the channel.

Anahtar Kavram

Traditional Channels of Distribution Sequence
Tahmini Süre:1m 0s
Soru 598Soru →

Arrange the following economic activities in the correct sequential order of production and distribution, starting from the primary occupation stage to the tertiary occupation stage:

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence begins with extracting crude oil from offshore wells (primary stage), proceeds to refining crude oil into petroleum products (secondary stage), and concludes with distributing and retailing fuel to motorists (tertiary stage).
The correct sequence follows the standard industrial chain: natural resource extraction occurs first in the primary sector, processing into usable products occurs second in the secondary sector, and distribution to consumers occurs third in the tertiary sector.

Adım Adım Çözüm

1
Identify the primary occupation activity
Extracting crude oil is a primary occupation.
Primary occupations focus on acquiring raw materials directly from natural resources.
2
Identify the secondary occupation activity
Refining crude oil into petroleum products is a secondary occupation.
Secondary occupations convert raw materials into semi-finished or finished products through manufacturing and processing.
3
Identify the tertiary occupation activity
Distributing and retailing fuel at filling stations is a tertiary occupation.
Tertiary occupations provide commercial distribution and auxiliary services to end users.

Anahtar Kavram

Classification and sequential relationship between Primary (extractive), Secondary (manufacturing/processing), and Tertiary (commercial services) occupations.
Tahmini Süre:45s
Soru 599Soru →

A commercial enterprise is establishing an automated electronic data processing system for its business records. In what sequence should the following stages of the computerized data processing and business records management cycle be executed from initial transaction entry to final record safeguarding?

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence is: Data Capture → Data Validation → Master File Processing → Output Generation → Archiving and Backup.
The computerized data processing cycle follows a strict logical flow: input data must first be captured from source documents, validated through system controls to prevent corrupt entries, processed against master files to update accounts, formatted into output reports for decision-making, and finally archived for security and audit compliance.

Adım Adım Çözüm

1
Identify initial entry stage
Data Capture is selected first.
Physical source transactions must be converted into digital input format before any system operations can take place.
2
Determine validation placement
Data Validation is placed second.
Input validation rules must inspect raw captured data to reject invalid entries before file modification.
3
Identify core record processing
Master File Processing is placed third.
Once validated, transaction data updates central database files and account balances.
4
Determine reporting stage
Output Generation is placed fourth.
Reports, statements, and summaries are generated directly from the newly updated database records.
5
Identify data protection stage
Archiving and Backup is placed fifth.
Finalized records and transaction logs are stored off-site for audit trails and disaster recovery.

Anahtar Kavram

End-to-End Computerized Data Processing and Business Record Lifecycle
Tahmini Süre:2m 0s
Soru 600Soru →

Arrange the following stages of computerized data processing in a business firm in their correct logical sequence from start to finish.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct logical order is: Capturing raw commercial transaction details on source documents, followed by digitizing and entering transaction data into the computer system, then manipulating data, performing calculations, and updating master files, and finally generating output reports and financial statements for management decision-making.
The correct sequence follows the standard Electronic Data Processing (EDP) cycle for business records management: Data Collection (capturing transaction details), Data Input (entering transaction data), Data Processing (performing calculations and updating master files), and Data Output (generating reports).

Adım Adım Çözüm

1
Identify the data collection and origination stage.
Capturing raw commercial transaction details on source documents occurs first.
Business data must originate from physical or digital sales receipts and invoices before computerized operations can take place.
2
Identify the data entry stage.
Digitizing and entering transaction data into the system comes second.
Source document details must be entered via input hardware into machine-readable format.
3
Identify the processing and database updating stage.
Manipulating data, performing calculations, and updating master files comes third.
The system must process input data by updating account balances and ledger database files.
4
Identify the output generation stage.
Generating output reports and financial statements comes last.
Information is extracted after processing to provide management with decision-making reports.

Anahtar Kavram

Electronic Data Processing (EDP) Cycle in Business Records
Tahmini Süre:1m 0s
ÖncekiSayfa 30 / 32Sonraki
Tüm alıştırma soruları — JAMB UTME | Examkin