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Waec 2018 Biology Practical QUESTION AND ANSWERS Free Expo is Out .



1ai)
A- lives in stagnant water
B- lives in Leftovers food

(1ai)
A - Stagnant water (aquatic habitat)
B - Decomposing matter(terrestrial habitat)

(1aii)
A- Mosquito(Anopheles).
B- Housefly.

(1aiii)
A - Arthropoda (phylum)
Insecta (class)

B - Arthropoda (phylum)
Insecta (class)

(1b)
Specimen A
(i) It has bristles.
(ii) It has horny jaw.
(iii) It has siphon

Specimen B
(i) It has a hook.
(ii) It has mouth.
(iii) It has spiracles.

(1ci)
In a tabular form
Under A
(i) It has not got a hook
(ii) It has a bristle.
(iii) It has siphon
(iv) It has mouth brush.

Under B
(i) It has a hook
(ii) It doesn't have a bristle.
(iii) It does not have siphon.
(iv) It does not have mouth brush.

(1cii)
(i) They are both segmented organisms.
(ii) They both have mouth.
(iii) Both have thorax

(2a)
A- Fish
B- mammal
E- flowering plant

(2aii)
they are used for respiration

(2aiii)
i)possession of two rows of fine finger like filament
ii)possession of gill rakers
iii)possession of richly supplied blood capillaries

(2b)
i)they both are supplied with capillaries
ii)both of them are used for respiration


(4ai)
Sepals,petals,carpels and stamen

(4aii)
(i) Sepals - 5
(ii) Petals - 5
(iii)Carpels - 1
(iv) Stamen - 10

(4b)
(i) Sex-monoecious
(ii) Presence of both carpels and stamen

(4c)
(i) Bilateral
(ii) It can be cut vertically into two similar halves through one plane

(4d)
K - Insect

L - Wind

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BIOLOGY SPECIMEN:
Group I ( For all candidates)
Specimen A – Fresh/wet preserved mosquito larva in a petri dish containing water.
Specimen B – Fresh/wet preserved maggot in a petri dish containing water.
Specimen C – Gill of fish (freshly procured) in a petri dish containing water.
Specimen D – Lung of a small mammal(freshly preserved).
Specimen E – Dicotyledonous leaf (freshly plucked).
Specimen F – Membranous wing of a cockroach.

Group III (For candidates in Nigeria and the Gambia only)
Specimen K – Flower of pride of Barbados or caesalpinia
Specimen L – Mature Elephant grass or Guinea grass.
Specimen M – Flower of Hibiscus plant.

NB:
(i) All specimens can be provided as group specimens for five(5) to ten(10) candidates.
(ii) All specimens in each group must carry individual labels (Eg A, B, C, D, E and F in Group I)

+It is essential that each candidate should be provided with the following materials;
(i) glass jar cover or petri dish,
(ii) a beaker containing water,
(iii) a pair of forceps,
(iv) a hand of lens/magnifying lens,
(v) scalpel OR razor blade/knife

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