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![2026 WAEC Biology Essay & OBJ Answers [16th June]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijWptqT4I99qnDZuMifrLn4n73Ac5egdabYjPqqgI0trIVDx1hYlCsVwyqGESntqPDwMBOFwVp16CtQZPuQNI9D3WB77Y-FQs-AqLqV3nXJbytg_jSSDrj1h6oLGkZTMuRwLzfkbkpBcs/s1600/WAEC+LOGO.png "2026 WAEC Biology Essay & OBJ Answers [16th June]")
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Objectives (OBJ) Questions and Answers for School Candidates Free of Charge |
WAEC May/June Free Biology Questions and Answers EXPO Room (16th June, 2026).
WAEC May/June 2026 FREE BIOLOGY ANSWER ROOM [School Candidates]
Tuesday, 16th June 2026
Tuesday, 16th June 2026
Biology 2 (Essay) – 09:30am – 11:10am
Biology 1 (Objective) – 11:10am – 12:00pm
Biology 1 (Objective) – 11:10am – 12:00pm
2026 WAEC BIOLOGY OBJECTIVES (OBJ) ANSWERS:
1. An example of physiological variation is✅ D. blood group
2. The type of variation illustrated in the tongue-rolling diagram is
✅ B. discontinuous
3. The appearance shown in the chromosome diagram is
✅ C. chiasma formation
4. If the genotypes of both parents are AS × AS, the likely percentage of sicklers is
✅ A. 25%
5. DNA replication occurs in a cell during
✅ B. interphase of mitosis
6. If the chromosome number of the root tip is 16, the chromosome number of the leaf is
✅ B. 16
7. The following conditions are sex-linked except
✅ C. diabetes
8. Evolution by natural selection is most likely to occur where there is
✅ D. more variation in a population
9. The term used to describe the extinction of dinosaurs and rise in number of birds is
✅ B. evolution
5. DNA replication occurs in a cell during
✅ B. interphase of mitosis
6. If the chromosome number of the root tip of onion is 16, the chromosome number of the leaf is
✅ A. 16
7. The following conditions are sex-linked except
✅ C. diabetes
8. Evolution by natural selection is most likely to occur where there is
✅ D. more variation in a population
9. The term used to describe the extinction of dinosaurs and rise in number of birds is
✅ B. evolution
10. Fossils are usually found in
✅ A. sedimentary rocks
11. The illustrated diagram is a pyramid of
✅ B. numbers
12. Organisms that would occupy the first level are
✅ A. grasses
13. The following substances are products of decomposition except
✅ D. faeces
14. Commensalism is a relationship in which
✅ C. one partner benefits and the other neither loses nor benefits
15. Which of the following statements is correct about ecdysis? It is the
✅ D. periodic shedding of exoskeleton for growth
16. A dodder plant is parasitic because it
✅ D. possesses haustoria
17. An activity that encourages conservation is
✅ B. using old newspapers to make tissue papers
✅ B. interphase of mitosis
6. If the chromosome number of the root tip of onion is 16, the chromosome number of the leaf is
✅ A. 16
7. The following conditions are sex-linked except
✅ C. diabetes
8. Evolution by natural selection is most likely to occur where there is
✅ D. more variation in a population
9. The term used to describe the extinction of dinosaurs and rise in number of birds is
✅ B. evolution
10. Fossils are usually found in
✅ A. sedimentary rocks
11. The illustrated diagram is a pyramid of
✅ B. numbers
12. Organisms that would occupy the first level are
✅ A. grasses
13. The following substances are products of decomposition except
✅ D. faeces
14. Commensalism is a relationship in which
✅ C. one partner benefits and the other neither loses nor benefits
15. Which of the following statements is correct about ecdysis? It is the
✅ D. periodic shedding of exoskeleton for growth
16. A dodder plant is parasitic because it
✅ D. possesses haustoria
17. An activity that encourages conservation is
✅ B. using old newspapers to make tissue papers
18. An ecosystem comprises antelopes and hyenas in the ratio 20:1. What would likely happen if hyenas were killed by a disease?
✅ B. Increase in the number of antelopes
19. Examples of non-renewable resources are
✅ D. petroleum, coal, tin and copper
20. The following measures are adequate for conserving crude oil except
✅ D. exploiting new crude oil reserves
21. Which of the following factors is responsible for phenotypic variation in organisms?
I – Genetic factors
II – Environmental factors
III – A–B–O blood group system
✅ C. I and II only
22. The process illustrated in the mammalian diagram is
✅ B. fertilization
23. The product resulting from the illustrated process
✅ A. undergo mitotic division
24. The correct pair of organism with its type of skeleton is
✅ B. earthworm and hydrostatic skeleton
25. Plant tissues that make up the bulk of young herbaceous plants are
✅ C. parenchyma
26. The component of blood in mammals which is circular, biconcave and non-nucleated is
✅ A. erythrocyte
27. Organisms that excrete uric acid do so because uric acid
✅ C. is excreted with minimal water loss
28. Homeostasis refers to
✅ C. maintenance of a steady internal environment of the body
29. Absorption of water by seeds during germination is
✅ C. imbibition
✅ B. Increase in the number of antelopes
19. Examples of non-renewable resources are
✅ D. petroleum, coal, tin and copper
20. The following measures are adequate for conserving crude oil except
✅ D. exploiting new crude oil reserves
21. Which of the following factors is responsible for phenotypic variation in organisms?
I – Genetic factors
II – Environmental factors
III – A–B–O blood group system
✅ C. I and II only
22. The process illustrated in the mammalian diagram is
✅ B. fertilization
23. The product resulting from the illustrated process
✅ A. undergo mitotic division
24. The correct pair of organism with its type of skeleton is
✅ B. earthworm and hydrostatic skeleton
25. Plant tissues that make up the bulk of young herbaceous plants are
✅ C. parenchyma
26. The component of blood in mammals which is circular, biconcave and non-nucleated is
✅ A. erythrocyte
27. Organisms that excrete uric acid do so because uric acid
✅ C. is excreted with minimal water loss
28. Homeostasis refers to
✅ C. maintenance of a steady internal environment of the body
29. Absorption of water by seeds during germination is
✅ C. imbibition
30. A teacher made a drawing of the brain and asked students to label the part responsible for regulation of heartbeat and respiration. The part should be
✅ D. medulla oblongata
31. A hormone responsible for the development of secondary sexual characters in females is
✅ A. oestrogen
32. The organism that is the smallest in size is
✅ A. a virus
33. The correct order of complexity of life organisms is
(Cycad, Spirogyra, Fern, Tridax)
✅ B. Spirogyra → Fern → Cycad → Tridax
34. A characteristic common to all the organisms is that they
✅ C. possess chlorophyll
35. An organelle found in large number in the muscles of the heart is
✅ B. mitochondrion
36. Which of the labelled parts qualify the organism as an animal?
✅ B. II, IV and V
37. The part labelled III in the illustrated organism is used for
✅ D. photosynthesis
38. Which of the following pair of structures perform the same function in their organisms?
✅ B. Contractile vacuole and kidney
39. The tentacles in a hydra were cut off and could not be regenerated. The functions that would be impaired are
✅ B. movement and nutrition
40. An organism possesses cell wall in its cell. Another structure that would be unique to the cell of the organism is
✅ B. chloroplast
✅ D. medulla oblongata
31. A hormone responsible for the development of secondary sexual characters in females is
✅ A. oestrogen
32. The organism that is the smallest in size is
✅ A. a virus
33. The correct order of complexity of life organisms is
(Cycad, Spirogyra, Fern, Tridax)
✅ B. Spirogyra → Fern → Cycad → Tridax
34. A characteristic common to all the organisms is that they
✅ C. possess chlorophyll
35. An organelle found in large number in the muscles of the heart is
✅ B. mitochondrion
36. Which of the labelled parts qualify the organism as an animal?
✅ B. II, IV and V
37. The part labelled III in the illustrated organism is used for
✅ D. photosynthesis
38. Which of the following pair of structures perform the same function in their organisms?
✅ B. Contractile vacuole and kidney
39. The tentacles in a hydra were cut off and could not be regenerated. The functions that would be impaired are
✅ B. movement and nutrition
40. An organism possesses cell wall in its cell. Another structure that would be unique to the cell of the organism is
✅ B. chloroplast
41. In a practical class, baker’s yeast was added to bread dough that rose after 30 minutes. The gas responsible for the rise observed is
✅ A. carbon (IV) oxide
42. The instrument in the experimental setup that would be used to measure the rate of water loss is
✅ B. potometer
43. A structure in the plant that is primarily responsible for water loss is
✅ C. stomata
44. The primary hydrogen acceptor in photosynthesis is
✅ D. NADP
45. An organism that carries out both intracellular and extracellular digestion is
✅ C. hydra
46. The mode of nutrition of an organism that digests its food externally is
✅ B. Saprophytic
47. A sample of urine from a patient was tested with Benedict’s solution and the observation was an orange precipitate. This could indicate
✅ B. diabetes
48. During ecological survey, high birth rate, low mortality and high immigration were observed. The likely implication is
✅ C. increased competition and food shortage
49. A measure to control the implication of the factors in the community is
✅ A. encourage birth control measures
✅ A. carbon (IV) oxide
42. The instrument in the experimental setup that would be used to measure the rate of water loss is
✅ B. potometer
43. A structure in the plant that is primarily responsible for water loss is
✅ C. stomata
44. The primary hydrogen acceptor in photosynthesis is
✅ D. NADP
45. An organism that carries out both intracellular and extracellular digestion is
✅ C. hydra
46. The mode of nutrition of an organism that digests its food externally is
✅ B. Saprophytic
47. A sample of urine from a patient was tested with Benedict’s solution and the observation was an orange precipitate. This could indicate
✅ B. diabetes
48. During ecological survey, high birth rate, low mortality and high immigration were observed. The likely implication is
✅ C. increased competition and food shortage
49. A measure to control the implication of the factors in the community is
✅ A. encourage birth control measures
50. Abiotic factors which are common to both aquatic and terrestrial habitats are
✅ A. light, rainfall and temperature
✅ A. light, rainfall and temperature
2026 WAEC BIOLOGY ESSAY OR THEORY ANSWERS:
(1ai)Pollination
(1aii)
(PICK ANY ONE)
Pollination is the transfer of pollen grains from the anther of a flower to the stigma of the same flower or another flower of the same species. Bees carry pollen on their bodies while collecting nectar, thereby transferring pollen between flowers and promoting fertilization.
OR
Pollination is the transfer of pollen grains from the anther to the stigma of a flower of the same species. In this case, bees act as pollinating agents by carrying pollen grains on their bodies from one flower to another while collecting nectar, thereby making fertilization possible.
(1bi)
BEES:
(PICK ANY TWO)
(i) Hairy body that traps pollen grains.
(ii) Long proboscis/tongue for sucking nectar.
(iii) Ability to fly from flower to flower.
(iv) Keen sense of smell for locating flowers.
(v) Legs adapted with pollen baskets (corbiculae) for carrying pollen.
(1bii)
PLANTS:
(PICK ANY TWO)
(i) Brightly coloured petals.
(ii) Sweet smelling flowers.
(iii) Presence of nectar.
(iv) Large conspicuous flowers.
(v) Sticky pollen grains.
(vi) Flowers that provide landing platforms for insects.
(1c)
(PICK ANY ONE)
(i) IT provides nectar as food.
(ii) It provides pollen as food.
(iii) It provides resting sites.
(iv) It supplies materials used in hive activities.
(1di)
(i) Androecium
(ii) Gynoecium
(1dii)
(i) Calyx
(ii) Corolla
(1e)
(PICK ANY ONE)
Double fertilization is a process in flowering plants where two male nuclei enter the embryo sac. One male nucleus fuses with the egg cell to form a diploid zygote, while the second male nucleus fuses with the two polar nuclei to form the triploid endosperm, which nourishes the developing embryo.
OR
Double fertilization occurs when the pollen tube releases two male nuclei into the embryo sac. One nucleus fertilizes the ovum to form a zygote, while the second nucleus combines with the polar nuclei to form the endosperm.
(1f)
(PICK ANY TWO)
(i) Dry pod that splits open when ripe
(ii) Fruit bursts suddenly, scattering seeds away from the parent plant.
(iii) Lightweight seeds that can be thrown some distance.
(iv) Tough pod that stores tension before splitting.
(1g)
Cowpea - Marginal
Okra - Axile
Pawpaw - Parietal
(2a)
(PICK ANY ONE)
Translocation is the movement of manufactured food substances, mainly sugars, from the leaves where they are produced to other parts of the plant through the phloem tissues for storage, growth and respiration.
OR
Translocation is the process by which soluble food materials produced during photosynthesis are transported from the leaves to all parts of the plant through the phloem. These food materials are moved to regions where they are needed for growth, respiration and storage.
(2b & 2c)
(PICK ANY ONE)
Translocation is the movement of manufactured food substances, mainly sugars, from the leaves where they are produced to other parts of the plant through the phloem tissues for storage, growth and respiration.
OR
Translocation is the process by which soluble food materials produced during photosynthesis are transported from the leaves to all parts of the plant through the phloem. These food materials are moved to regions where they are needed for growth, respiration and storage.
(2b & 2c)
(3a)
(3bi)
Iroko
(3bii)
(PICK ANY ONE)
(i) Quadrat sampling
(ii) Transect method
(iii) Plot sampling
(3c)
Population density = Population ÷ Area
= 5 ÷ 1000
= 0.005 plants/m²
(3di)
(PICK ANY FOUR)
(i) Establishment of forest reserves.
(ii) Afforestation (planting of trees).
(iii) Reforestation of deforested areas.
(iv) Enforcement of laws against illegal logging.
(v) Establishment of national parks/game reserves.
(vi) Public education on conservation.
(vii) Controlled harvesting of forest resources.
(viii) Prevention of bush burning.
(3dii)
(PICK ANY FOUR)
(i) Source of timber for construction and furniture.
(ii) Source of medicinal plants.
(iii) Helps regulate climate and rainfall.
(iv) Prevents soil erosion.
(v) Provides employment opportunities.
(vi) Conserves biodiversity.
(vii) Serves as a source of food and raw materials.
(viii) Acts as a recreational and tourist centre.
(4a)
Social insects
(4b)
Social insects
(4b)
(4c)
(PICK ANY TWO)
(i) Termites
(ii) Ants
(iii) Honey bees
(4di)
(PICK ANY THREE)
(i) Division of labour among members.
(ii) Efficient food collection and storage.
(iii) Better protection/defence against enemies.
(iv) Care and protection of the young.
(v) Increased survival of the colony.
(vi) Efficient reproduction and continuity of the colony.
(4dii)
(PICK ANY TWO)
(i) Through the use of chemical substances called pheromones.
(ii) They communicate by touching one another with their antennae.
(iii) They communicate through sound or vibrations.
(iv) They communicate through dance movements (e.g., honey bees).
(5a)
(PICK ANY ONE)
Energy flow in an ecosystem is non-cyclic because energy is lost as heat at each trophic level and cannot be recycled back to the producers. Therefore, energy flows in one direction only.
OR
Energy flow in an ecosystem is non-cyclic because energy enters the ecosystem from the sun and is gradually lost to the environment as heat during metabolic activities, making it unavailable for reuse.
(5b)
(PICK ANY ONE)
Energy flow in an ecosystem is non-cyclic because energy is lost as heat at each trophic level and cannot be recycled back to the producers. Therefore, energy flows in one direction only.
OR
Energy flow in an ecosystem is non-cyclic because energy enters the ecosystem from the sun and is gradually lost to the environment as heat during metabolic activities, making it unavailable for reuse.
(5b)
(5c)
(PICK ANY THREE)
(5di)
Energy can neither be created nor destroyed but can only be transformed from one form to another.
(5dii)
Energy transfer from one trophic level to another is not 100% efficient because some energy is lost as heat during each transfer.
(5e)
(PICK ANY THREE)
(i) Hooks and suckers for attachment.
(ii) Thin body covering for absorption of digested
(iii) Absence of digestive system.
(iv) Long, flattened body with large surface area for absorption.
(v) Produces numerous eggs.
(5fi)
A: Aquatic habitat
B: Terrestrial habitat
(5fii)
A:
(PICK ANY TWO)
(i) Water current
(ii) Salinity
(iii) Dissolved oxygen
(iv) Water temperature
(v) Water depth
B:
(PICK ANY TWO)
(i) Wind
(ii) Soil type
(iii) Temperature
(iv) Rainfall
(v) Humidity
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6 Comments
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ReplyDeleteTime is almost up & answers have not yet still released 😢
ReplyDeleteNo need for the objectives answers, they've started collecting papers already 😢
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