WAEC 2026 Biology Question And Answers (Obj & Theory)

Are you searching for the correct WAEC 2026 Biology Question And Answers (Obj & Theory)? Do you need genuine and verified WAEC  Questions and Answers 2026 for the May/June examination? Welcome to Naijaclass.com, your trusted platform for accurate WAEC updates and examination assistance.

Tuesday, 16th June 2026
Biology 2 (Essay) 9:30am – 11:10am.
Biology 1 (Objective) 11:10am – 12:00noon

 

*WAEC OBJECTIVE ANSWERS*

Pls; Use This Answers to trace on ur booklet .

Biology objective

1. D – blood group
2. C – discontinuous
3. B – formed in anaphase II
4. C – 75%
5. C – anaphase of mitosis
6. A – 8
7. A – haemophilia
8. B – a stable environment
9. C – variation
10. B – sedimentary rocks

11. B – numbers
12. A – grasses
13. D – faeces
14. C – one partner benefits and the other neither loses nor benefits
15. D – periodic shedding of exoskeleton for growth
16. D – possesses haustoria
17. B – using old newspapers to make tissue papers
18. B – Increase in number of antelopes
19. D – petroleum, coal, tin and copper
20. D – exploiting new crude oil reserves

21. C – I and II only
22. B – fertilization
23. A – undergo mitotic division
24. B – earthworm and hydrostatic skeleton
25. C – parenchyma
26. A – erythrocyte
27. C – is excreted with minimal water loss
28. C – maintenance of a steady internal environment of the body
29. C – imbibition
30. D – medulla oblongata

31. A – oestrogen
32. A – a virus
33. B – Spirogyra → fern → cycad → Tridax
34. C – possess chlorophyll
35. B – mitochondrion
36. B – II, IV and V
37. D – photosynthesis
38. B – Contractile vacuole and kidney
39. B – movement and nutrition
40. B – chloroplast

41. A – carbon (IV) oxide
42. A – potometer
43. C – stomata
44. D – NADP
45. C – hydra
46. B – saprophytic
47. B – diabetes
48. C – increased competition and food shortage
49. A – encourage birth control measures
50. A – light, rainfall and temperature

*COMPLETED*

(1a)(i) Pollination.

(1a)(ii) Pollination is the transfer of pollen grains from the anther to the stigma of a flower of the same species. In this case, bees carry pollen grains from one flower to another while feeding on nectar.

(1b)(i) Bees
(PICK ANY TWO)
(i) Hairy body which traps pollen grains.
(ii) Long proboscis for sucking nectar.
(iii) Strong wings for moving from flower to flower.
(iv) Well-developed sense of smell for locating flowers.

(1b)(ii) Plants
(PICK ANY TWO)
(i) Brightly coloured petals which attract bees.
(ii) Sweet scent which attracts bees.
(iii) Presence of nectar in the flowers.
(iv) Sticky pollen grains which adhere to the body of bees.

(1c) The plants provide nectar as food for the bees.

(1d)(i) (i) Androecium (stamens)
(ii) Gynoecium (carpels/pistil)

(1d)(ii)
(i) Petals (corolla)
(ii) Sepals (calyx)

(1e) Double fertilization is the process in which two male gametes take part in fertilization. One male gamete fuses with the egg cell to form a zygote, while the other fuses with the two polar nuclei to form the endosperm.

(1f) (PICK ANY TWO)
(i) The fruit is a dry pod that splits open when ripe.
(ii) The pod bursts explosively, scattering the seeds.
(iii) The fruit has elastic valves that aid seed dispersal.
(iv) The pod becomes dry and dehiscent at maturity.

(1g) Cowpea – Marginal
Okra – Axile
Pawpaw -Parietal
Pawpaw- Parietal
============================================

*WAEC BIOLOGY*

(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)

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

(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.

=============
ANOTHER
=============

(3bii)
(PICK ANY ONE)
(i) Quadrat sampling method.
(ii) Transect sampling method.
(iii) Plot sampling method.
(iv) Random sampling method.
(v) Census/counting method.

(3c)
Population Density = Number of Hevea sp. ÷ Area of rainforest
= 5 ÷ 1000
= 0.005 plants/m²

(3di)
(PICK ANY FOUR)
(i) Establishing game reserves and national parks.
(ii) Enforcing laws against poaching and illegal hunting.
(iii) Afforestation and reforestation programmes.
(iv) Captive breeding of endangered species.
(v) Public enlightenment on conservation.
(vi) Protection of natural habitats.
(vii) Regulating exploitation of forest resources.
(viii) Establishment of seed banks and gene banks.

(3dii)
(PICK ANY FOUR)
(i) Provides timber and other forest products.
(ii) Prevents soil erosion.
(iii) Regulates climate and rainfall.
(iv) Improves air quality by releasing oxygen.
(v) Conserves biodiversity.
(vi) Provides employment opportunities.
(vii) Serves as a source of medicinal plants.
(viii) Protects water catchment areas.
================================================

(4a)
Social behaviour

(4b)
Check the image below

(4c)
(i) Termites
(ii) Honey bees

(4di)
(PICK ANY THREE)
(i) Division of labour increases efficiency.
(ii) Better protection against predators and enemies.
(iii) Easier collection and storage of food.
(iv) Proper care and protection of young ones.
(v) Increased chances of survival of the colony.
(vi) Faster construction and maintenance of nests.
(vii) Efficient utilization of resources.
(viii) Greater success in reproduction.

(4dii)
(i) Chemical signals (pheromones).
(ii) Touching/contact through antennae.

NUMBER 4

*WAEC BIOLOGY*

(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)

(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

NUMBER 5