WAEC Biology Practical Answers 2026/2027

By WAEC2026 June 16, 2026 Blog, WAEC Questions & Answers, WAEC Questions 2026 0 Comments

WAEC Biology Practical Answers 2026/2027: Biology practical examinations require accurate identification of specimens, including plants, animals, and laboratory apparatus. Candidates should draw neat diagrams using a sharp HB pencil, avoid shading, indicate magnification where necessary, and ensure label lines are straight and do not cross.

WAEC Biology Practical Answers 2026/2027

1a)
Fill the table;

Under; TEST
(i) Iodine test
(ii) Biuret test
(iii) Grease spot test/filter paper test

Under; OBSERVATION
(i) No blue-black colouration; iodine remains brown/yellow-brown
(ii) Purple/violet colouration appears
(iii) Translucent/greasy spot is seen on the filter paper

Under; INFERENCE
(i) Starch is absent
(ii) Protein is present
(iii) Fat/oil is present

(1b)
(PICK ANY FIVE)
(i) It is rich in protein needed for growth and repair of body tissues.

(ii) It contains fat/oil which provides energy for metabolic activities.

(iii) It contains mineral salts needed for bone and teeth development.

iv) It contains vitamins needed for healthy growth.

(v) It provides energy needed for the child’s physical activities.

(vi) It helps in building body tissues in a growing child.

(1ci)
Legume/pod.

(1cii)
It develops from a single carpel and splits along two sides when ripe to release its seeds.

1cii)
It develops from a single carpel and splits along two sides when ripe to release its seeds.

(1d)

Diagram

2ai)
(i) Peristalsis
(ii) Chemical digestion

(2aii)
(i) Peristalsis occurs in the oesophagus.
(ii) Chemical digestion occurs in the stomach.

(2b)
(i) It has muscular walls for churning/mixing food.

(ii) It has a narrow tubular oesophagus for movement of food.

iii) It has folded inner walls/rugae for expansion.

(iv) It has a sac-like stomach for temporary storage of food.

(2c)
(i) Pepsin
(ii) Rennin/Gastric lipase

(2d)
Draw specimen F and label:
(i) Oesophagus
(ii) Stomach
(iii) Cardiac sphincter
(iv) Pyloric sphincter
(v) Duodenum opening

(2ei)
Parasitism.

(2eii)
Specimen G benefits by obtaining water and mineral salts from the host plant, while the host plant is harmed.

(2eiii)
Presence of haustoria/sucking roots which penetrate the host plant and absorb water and mineral salts.

Number 3

(3a)
Complete the table;

Under; Material for preservation:
(i) Refrigerator
(ii) Salt
(iii) Fire
(iv) Empty tin
(v) Sunlight

Under; One specimen that could be preserved with material:
(i) J
(ii) J
(iii) J
(iv) L
(v) K

Under; Name of method of preservation:
(i) Refrigeration/freezing
(ii) Salting
(iii) Smoking/drying
(iv) Canning
(v) Sun-drying

Under; One reason for preservation method:
(i) Low temperature slows down the activities of microorganisms.

(ii) Salt removes water from microorganisms and prevents their growth.

(iii) Heat kills microorganisms and reduces the moisture content of the food.

(iv) The tin prevents entry of air and microorganisms.

(v) Sunlight removes moisture from the food and prevents the growth of microorganisms.

(3b)
(i) Bacteria

(ii) Fungi

(3c)
(i) Weevil

(ii) Grain moth

(3d)
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(3e)
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Number 4

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