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NECO Biology Questions and Answers 2025 (OBJ & Essay)

Posted by examwise

Subject: Biology

PIN: 555

Access the full NECO Biology Answers for 2025 here. This page will be updated with accurate solutions to both objective (OBJ) and essay questions before the exam starts. Refresh the page regularly to see the latest answers.

NECO Biology OBJ Answers 2025

1-10: ————————–

11-20: ————————-

21-30: ————————

31-40: ————————

Solving/Typing…


NECO Biology Essay Answers 2025

Number 1

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Number 2

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Number 3

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Number 4

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Number 5

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NECO History Questions and Answers 2025 (OBJ & Essay)

Posted by examwise

Subject: History

PIN: 555

Access the full NECO History Answers for 2025 here. This page will be updated with accurate solutions to both objective and essay questions before the exam starts. Refresh the page regularly to get the latest verified answers.

NECO History OBJ 2025

HISTORY OBJ
01-10: CBADBBCADA
11-20: ADDBBACCAC
21-30: CDBCCDCBBB
31-40: ACBBACEABA
41-50: DAEDAEACCE
51-60: BDABD

COMPLETED


NECO History Essay 2025

(1)
(i) Geographical advantages: The availability of fertile land and favorable climatic conditions enabled agricultural surplus, which supported large populations. This agricultural prosperity created the need for organized governance structures to manage resources and ensure security, leading to centralized control.

(ii) Trade and economic development: The growth of long-distance trade routes encouraged the rise of powerful leaders who could protect traders and regulate markets. The accumulation of wealth through trade demanded a centralized authority to control economic activities and coordinate interactions with foreign merchants.

(iii) Military strength and conquest: Communities that developed strong military forces were able to subdue neighboring areas and incorporate them into larger political units. Centralized states emerged as a result of the need to maintain order, defend boundaries, and administer conquered territories under a single authority.

(iv) Religion and spiritual authority: Religious beliefs played a role in unifying people under a central leader who was seen as divinely guided or possessing spiritual power. This spiritual legitimacy helped rulers command obedience and loyalty, thereby strengthening centralized political systems.

(v) Administrative efficiency: The establishment of organized bureaucracies helped central authorities manage their domains more effectively. The creation of structured administrative systems allowed rulers to collect taxes, enforce laws, and maintain communication across wide territories, reinforcing centralization.

(vi) Cultural and linguistic unity: Shared customs, languages, and traditions contributed to a sense of collective identity among people within a region. This unity made it easier for centralized leadership to emerge and be accepted by the population, fostering stable governance and centralized institutions.

=========================================

(2)
(i) Clan-based structure: The Isoko society was organized into clans, which were extended family groups tracing their ancestry to a common forebear. Each clan functioned as a distinct social and political unit, with its own internal governance and leadership system.

(ii) Council of elders: Leadership within the Isoko clans was vested in a council of elders composed of the most senior and respected members of the community. These elders made decisions on important matters such as land disputes, communal issues, and the enforcement of customary laws.

(iii) Gerontocracy: The Isoko political system was gerontocratic, meaning that age determined leadership. The oldest male members of society held the most influence, as wisdom and experience were highly valued. The oldest man in a community often served as the clan head or community leader.

(iv) Village autonomy: Each Isoko village operated as an independent political unit with its own leadership and decision-making body. There was no central authority governing all villages, and inter-village relations were based on mutual respect, alliance, and sometimes conflict resolution through negotiations.

(v) Customary laws and traditions: The Isoko people were governed by unwritten customary laws that had been passed down through generations. These customs regulated marriage, inheritance, land ownership, and social conduct, and were enforced by the council of elders.

(vi) Religious leadership: Religion played a vital role in governance. Priests and religious leaders were responsible for conducting rituals, maintaining shrines, and serving as intermediaries between the people and the spiritual world. These leaders held significant influence over political decisions and social order.

(3)
(i) Expansion of the slave trade: Commercial relations with Europe intensified the trans-Atlantic slave trade, leading to widespread capture and sale of people. This resulted in population loss, disruption of families, and long-term social instability across many Nigerian communities.

(ii) Emergence of powerful merchant elites: The trade created a wealthy class of local African middlemen who acted as intermediaries between European traders and local producers. These elites gained political influence and sometimes challenged traditional authorities, altering existing power structures.

(iii) Increased warfare and insecurity: The demand for slaves encouraged inter-group conflicts and raids, as communities sought captives to sell to European traders. This led to militarization and the destruction of some settlements, creating a cycle of violence and instability.

(iv) Introduction of foreign goods: European goods such as textiles, alcohol, and firearms became widespread in Nigerian societies. These items changed consumption patterns, created dependency on foreign products, and sometimes undermined local industries and traditional crafts.

(v) Shifts in economic focus: Economic activities shifted from agriculture and internal trade to the external slave trade and export-oriented commerce. This change affected food production and internal trade networks, weakening the traditional economy and self-sufficiency.

(vi) Transformation of political systems: The wealth and influence gained from trade led to the centralization of some political systems, as rulers and warlords sought to control trade routes and markets. This strengthened the authority of some kingdoms but also created tensions and rivalries.

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(4)
(i) Overthrow of existing rulers: Usman Dan Fodio’s Jihad led to the fall of many Hausa kings who were seen as corrupt and un-Islamic. These rulers were replaced by Fulani emirs who pledged allegiance to the Sokoto Caliphate, resulting in a major political transformation across Hausaland.

(ii) Creation of the Sokoto Caliphate: One of the most significant effects of the Jihad was the establishment of the Sokoto Caliphate, a large and centralized Islamic empire that brought various Hausa states under one religious and political authority. This promoted greater unity among the previously fragmented territories.

(iii) Spread of Islam: The Jihad led to the widespread adoption of Islam in Hausaland. Islamic education, culture, and legal systems were promoted, with Sharia (Islamic law) becoming the basis for governance in many areas under the Caliphate’s control.

(iv) Reform of governance and justice: The Caliphate introduced Islamic administrative systems and legal reforms aimed at ensuring justice, morality, and accountability. Courts were established based on Islamic principles, and rulers were expected to lead according to Islamic values.

(v) Changes in social structure: The Jihad reduced the influence of traditional Hausa nobility and elevated the Fulani scholars and warriors who led the Islamic movement. Social mobility became possible for those who demonstrated religious knowledge and piety, regardless of ethnic background.

(vi) Impact on neighboring regions: The success of the Jihad inspired similar Islamic movements in other parts of West Africa. It also led to the expansion of trade, education, and diplomatic relations between Hausaland and surrounding Islamic states, spreading the influence of the Sokoto Caliphate beyond its borders.

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(5)
(i) Strategic location: Ibadan was situated in a fertile and defensible area, ideal for agriculture and trade. Its position between the northern savannah and southern forest zones made it a key center for commerce and military operations, attracting people and resources.

(ii) Military strength and organization: The city was founded by warriors and developed into a strong military state. Its well-organized army, led by war generals known as Baloguns, enabled it to conquer neighboring territories and defend against external threats, expanding its influence in Yorubaland.

(iii) Collapse of older Yoruba kingdoms: The fall of powerful kingdoms like Oyo due to internal crises and external attacks created a power vacuum. Ibadan emerged as a new center of authority by absorbing refugees, warriors, and administrators from these collapsed states, boosting its population and leadership capacity.

(iv) Effective political structure: Ibadan’s unique political system, which combined military leadership with a council of elders, ensured stability and effective governance. Power was shared among war chiefs, promoting collective decision-making and preventing tyranny.

(v) Control of trade routes: Ibadan dominated important trade routes linking Yorubaland to the north and south. By securing these routes, it became a hub for the exchange of goods such as kola nuts, palm oil, and imported items, increasing its wealth and regional importance.

(vi) Absorption of skilled migrants: The city attracted a diverse population of artisans, traders, farmers, and scholars fleeing wars elsewhere in Yorubaland. This influx of talent and labor contributed to Ibadan’s economic growth, cultural richness, and political stability, solidifying its status as a major power.

(6)
(i) Economic interests: The British were eager to gain direct control over trade in the Benin region, especially the palm oil trade, which was vital to their industrial economy. Benin’s refusal to open its markets freely to British merchants created tensions, as the British sought to eliminate restrictions and monopolize commerce.

(ii) Resistance to British influence: The Oba of Benin firmly resisted British interference in the kingdom’s internal affairs. He rejected treaties and limited British presence in his territory, which was seen as a challenge to British imperial authority and their goal of expanding colonial control in West Africa.

(iii) Strategic colonial expansion: Britain aimed to consolidate its control over southern Nigeria and establish a continuous territory under its rule. Conquering Benin was seen as essential for connecting other colonial territories and strengthening administrative control in the Niger Delta region.

(iv) Misrepresentation of events: The British used the ambush of a British-led delegation in 1897 as justification for military intervention. Although the Oba had warned against the visit due to ongoing sacred rituals, the incident was portrayed as an unprovoked attack, giving the British a pretext for invasion.

(v) Desire to eliminate slavery and human sacrifice: British colonial propaganda emphasized the need to end practices such as slavery and human sacrifice in Benin. These moral arguments were used to gain support for the conquest, though economic and political motives were the primary drivers.

(vi) Use of superior military technology: The British had advanced weaponry and well-trained forces, which they used to overpower Benin’s traditional army. Their military advantage made the conquest swift and decisive, allowing them to capture the city, depose the Oba, and annex the kingdom into the British Empire.

COMPLETED











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WAEC Biology Questions and Answers 2025 (OBJ & Essay)

Posted by examwise

Subject: Biology

PIN: 555

Access the full WAEC Biology Answers for 2025 here. This page will be updated with accurate solutions to both Objective (OBJ) and Essay questions before the exam begins. Stay tuned and refresh the page regularly to get the latest verified answers and explanations.

WAEC Biology OBJ 2025

TYPE A
1–10: C D C C D C D C D A
11–20: B D A C B A C B A A
21–30: B B A C B B C A B C
31–40: D A B C A B B A C D
41–50: C D C B C A B B A D

TYPE B
1–10: C A C B C B A B B A
11–20: B C C C A B B C B D
21–30: B B A D C A C A A C
31–40: B B C A C D B C A L
41–50: B C B A C C C B C A

TYPE C
1–10: A B C A B C C A C C
11–20: C B C B A C A B C C
21–30: C B C B B C A B A C
31–40: A A B D B B A B A A
41–50: C A A D B B A B B A


TYPE D
1–10: B C A C A B C B A B
11–20: C A B B A C B A C B
21–30: A D B B C D A D B –
31–40: A B A A D C B C C B
41–50: C C C B B A A C A C

Note: No Question 30 in Alternative D

NOTE; YOU ARE TO TRACE THIS FROM YOUR BOOKLET TO GET A ACCURATE RESULTS ,PLEASE TAKE YOUR TIME AND TRACE IT ANY WHERE YOU SEE THE ANSWERS WE PICK CHOOSE IT FROM YOUR OPTIONS

1: Homo.

2: cockroach.

3: moulting.

4: apex, midrib, lamina, axil.

5: II.

6: support

7: I

8: haemolysed

9: 18

10: mechanical support.

11: phagocytosis

12: circulatory

13: Light and chlorophyll must be present for it to occur

14: much water has been removed from urine

15: indole acetic acid.

16: constriction of the arteries.

17: convex lens

18: malleus

19: fibrous covering.

20: annuals

21: breakdown.of complex molecules into simple molecules.

22: K.

23: II.

24: I and II

25: digestion of food and absorption of nutrients

26: Two pairs of incisors are on the upper jaw and three pairs of premolars are on the lower jaw

27: competition

28: pressure

29: Secchi disc

30: in water

31: remains unchanged

32: Energy decreases from the base to the apex of the pyramid

33: Excessive phosphates massive algal growth aquatic organisms lack of oxygen death of

34: Tilapia in a lake

35: 18.50/m²

36: Eating balanced diet

37: Tuberculosis

38: loss of soil particles.

39: Domestic wastes

40: Felling of trees

41: Height and blood group

42: physiological variation

43: chromosomes.

44: 1/4.

45: DNA replication.

46: 32%.

47: Females are not carriers.

48: organisms transfer acquired characters to their offspring.

49: drones, queen, and workers.

50: Charles Darwin.

COMPLETED!!!


WAEC Biology Essay 2025

Number 1

(1a)
Excretion is the biological process by which living organisms remove metabolic waste products and toxic substances produced from their body to maintain internal balance and prevent harm.

(1bi)
(i) Urea
(ii) Carbon dioxide

(1bii)
(i) Oxygen
(ii) Water

(1c)
[TABULATE]

=Organism=
(i) Paramecium
(ii) Planaria
(iii) Leaf of plant
(iv) Earthworm

=Excretory structure=
(i) Contractile vacuole
(ii) Flame cells
(iii) Stomata
(iv) Nephridia

=Mechanism involved in excretion=
(i) Osmoregulation
(ii) Diffusion and filtration
(iii) Transpiration
(iv) Filtration and diffusion

=Adaptation of the structure for excretion=
(i) Thin semi-permeable membrane
(ii) Highly branched tubules for efficient removal
(iii) Guard cells regulate opening and closing of stomata
(iv) Extensive network increases surface area for excretion

(1d)
(i) Removes metabolic waste products from the blood.
(ii) Regulates water and salt balance.
(iii) Maintains acid-base balance and regulates blood pH.

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Number 2

(2a)
[TABULATE]

=Photosynthetic Nutrition=
(i) Energy is obtained from sunlight.
(ii) It occurs in green plants and some bacteria.

=Chemosynthetic Nutrition=
(i) Energy is obtained from chemical reactions involving inorganic substances.
(ii) It occurs in certain bacteria like nitrifying bacteria.

(2bi)
Saprophytes are organisms that feed on dead and decaying organic matter for their nutrition.

(2bii)
(i) Rhizopus
(ii) Mucor
(2biii)
Saprophytes secrete digestive enzymes onto dead organic material to break it down into simpler substances, which are then absorbed into their bodies.

(2biv)
(i) They decompose organic waste, helping in nutrient recycling.
(ii) They are used in the production of antibiotics.
(iii) Some are used in food production processes like fermentation.

(2c)
(i) They trap and digest small animals or insects.
(ii) They have specialized structures like sticky leaves or pitfall traps.
(iii) They often grow in nutrient-poor soils, hence the need for alternative nitrogen sources.

(2d)
(i) Butterflies feed by sucking nectar from flowers using a proboscis.
(ii) Mosquito larvae are filter feeders, feeding on microorganisms and organic matter in water.

(iii) Mucor feeds saprophytically by breaking down dead organic matter with enzymes and absorbing the nutrients.

(iv) Housefly feeds by sucking up liquid or semi-liquid food, often after regurgitating digestive enzymes to liquefy solid food.

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Number 3

(3a)
Carbon (IV) oxide (CO₂) and oxygen (O₂) are balanced in nature through the processes of photosynthesis and respiration. During photosynthesis, green plants use CO₂ and release O₂ into the atmosphere. During respiration and decomposition, animals and plants use O₂ and release CO₂ back into the atmosphere. This continuous cycle maintains a balance between the two gases in nature.

(3b)
(i) Amount of sunlight
(ii) Soil type and fertility
(iii) Availability of water
(iv) Temperature
(v) Presence of pests and diseases

(3ci)
Overcrowding in an ecosystem is a situation where the number of organisms exceeds the carrying capacity of the environment, leading to competition for limited resources such as food, space, and water.

(3cii)
(i) Increased competition for food and other resources
(ii) Spread of diseases and parasites
(iii) Higher mortality rate
(iv) Reduced growth and reproduction
(v) Migration or displacement of some organisms

(3di)
Density-dependent factors are factors whose effects on the population increase or decrease depending on the population density while density-independent factors are factors that affect populations regardless of their density.

(3dii)
(i) Competition for food
(ii) Spread of diseases

(3diii)
Density-dependent factors like competition and disease affect populations more as their size increases, helping regulate their numbers. Density-independent factors such as floods or temperature changes affect populations regardless of size. Both influence the balance of organisms in an ecosystem.

==================

Number 4

(4ai)
(i) Genetic factors
(ii) Environmental factors

(4aii)
Diagram

(4aiii)
Genotype: tt

(4bi)
Genotype is the genetic makeup or set of alleles possessed by an organism, usually with respect to a specific characteristic.

(4bii)
(i) Genetic recombination/mutation
(ii) Environmental influences

(4ci)
Allele is an alternative form of a gene found at the same locus (position) on homologous chromosomes, controlling the same characteristic.

(4cii)
[TABULATE]

=GENOTYPE=
(i) The genetic constitution or makeup of an organism.
(ii) Determined by inherited genes

=PHENOTYPE=
(i) The observable physical characteristics of an organism
(ii) Determined by genotype and environmental factors

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Number 5

(5a)
(i) Increased rate of evaporation leading to water loss and dehydration in organisms.
(ii) Denaturation of enzymes affecting metabolic processes.
(iii) Reduced reproductive success due to stress or death of gametes.
(iv) Migration or death of heat-sensitive species.
(v) Altered behavior such as seeking shade or burrowing to escape heat.

(5b)
(i) Destruction of vegetation and loss of plant cover.
(ii) Death of animals and destruction of habitats.
(iii) Soil erosion due to loss of protective plant cover.
(iv) Reduction in soil fertility as nutrients are lost through burning.
(v) Air pollution from smoke and release of greenhouse gases.

(5c)
(i) Coordination of international response to disease outbreaks.
(ii) Provision of guidelines and information on disease prevention and control.
(iii) Distribution of vaccines and medical supplies to affected areas.
(iv) Monitoring and surveillance of disease spread globally.

(5di)
Countershading in Tilapia is a camouflage adaptation where the back is dark and the belly is light. It helps the fish blend with its surroundings, protecting it from predators.

(5dii)
Seasonal migration in birds is the regular movement of birds from one region to another in response to changes in seasons. Birds often migrate to warmer areas to find food, breed, or escape harsh weather.

(5ei)
(i) Bacteria
(ii) Viruses
(iii) Fungi
(iv) Protozoa
(v) Algae

(5eii)
(i) Bacteria
(ii) Viruses

(5fi)
(i) Blood group A
(ii) Blood group B

(5fii)
(i) Agglutination (clumping) of red blood cells, which can block blood vessels and cause organ damage.
(ii) Hemolytic reaction, where the immune system destroys the transfused blood cells, leading to fever, chills, kidney failure, or even death

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Number 6

Solving/Typing…

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Number 7

Solving/Typing…

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Number 8

Solving/Typing…

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