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Waec 2018 Biology Practical Answers – May/June Expo
Views: 1621  |  Comments: 1 |  Posted: 12:10 Fri, 13 Apr 2018
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Monday, 16th April, 2018
Biology 3 (Practical) (Alternative A) – 09:30 a.m. – 11:30 p.m. (1st Set)
Biology 3 (Practical) (Alternative A) – 12:00 p.m – 2:00 p.m. (2nd Set)++++++++++++++++++++++++++++++++++

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

A- Mosquito(Anopheles).
B- Housefly.

A - Arthropoda (phylum)
Insecta (class)

B - Arthropoda (phylum)
Insecta (class)

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.

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.

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


C - Fish
D - Mammal
E - Flowering plant

They are used for respiration.

(i) Possession of two rows of fine finger like Gill filament.
(ii) Possession of gill rakers.
(iii) Possession of richly supplied blood capillaries.

(i) Both are supplied with blood capillaries.
(ii) Both of them are used for respiration.

In a tabular form; Specimen C and specimen D

Under specimen C
(i) Possession of gill rakers.
(ii) Possession of gill filament.
(iii) Possession of gill arch.

Under specimen D
(i) Possession of bronchus.
(ii) Possession of alveoli.
(iii) Possession of alveolar cavity.

Draw the 6cm-8cm long of specimen C ie Gill of fish


(ai) Sepals, Petals, Carpels and Stamens
(ii) Sepals - 5
(iii) Petals - 5
(iv) Carpels - 1
(v) Stamen - 10

(4bi) Sex - monoecious
(ii) presence of both Carpels and Stamens

i - Bilateral
ii - it can be cut vertically into two similar halves through one plane

K - insect
L - wind


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Photo Danchino2k@gmail (¥ 24 NU)
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