Waec Gce 2026 Biology Practical Answers

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Wednesday, 7th October, 2026
Biology 3 (Alternative to Practical Work) – 2hrs – 14:00 hrs – 16:00 hrs.

BIOLOGICAL PRACTICAL

NUMBER 1

(1ai)
Complete metamorphosis

(1aii)
The life cycle has four stages egg → larva → pupa → adult, and the larva looks completely different from the adult

(1aiii)
Part on D:
(i) Antenna
(ii) Compound eye
(iii) Wing
(iv) Leg

One function:
(i) Detects smell and touch
(ii) Used for seeing
(iii) Used for flying
(iv) Used for walking and landing

(1aiv)
Two breeding places:
(i) Refuse dumps
(ii) Animal dung or open latrines

(1b)
(i) B larva: Legless, worm-like body for burrowing into decaying food
(ii) C pupa: Hard outer case puparium that protects it from drying out and from enemies
(iii) D adult: Wings for flying

(1c)
(i) It spreads diseases such as cholera, typhoid and dysentery
(ii) It contaminates and spoils food

(1d)
Housefly:
(i) Four stages: egg, larva, pupa, adult
(ii) Larva is legless and unlike the adult
(iii) Has a pupa stage

Cockroach:
(i) Three stages: egg, nymph, adult
(ii) Nymph has legs and looks like a small adult
(iii) Has no pupa stage

(1e)
(i) Germs stick to their legs and body hairs when they feed on faeces, and they drop the germs on food when they land on it
(ii) They vomit digestive juices and pass faeces on food, which contaminates it

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NUMBER 2

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NUMBER 3

 

COMPLETED