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Waec 2018 Biology Practical Answers Expo/Runs Free

Last modified about 3 weeks ago by . Posted in Waec |

How to Get 2018 WAEC Biology Practical Expo/Runs Answers

2018 WAEC Biology Practical Answers

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(2ai)
C – Fish
D – Mammal
E – Flowering plant

(2aii)
They are used for respiration.

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

(2bi)
(i) Both are supplied with blood capillaries.
(ii) Both of them are used for respiration.

(2bii)
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.

(2c)
Draw the 6cm-8cm long of specimen C ie Gill of fish
2c)
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4)
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

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

4d)
K – insect
L – wind

(4e)
In a tabular form; K and L

Under K
(i) Has very bright colours.
(ii) Single flower per stalk.
(iii) Has petals.
(iv) Lacks bracts.

Under L
(i) Lacks bright colours.
(ii) Bears many flowers per stalk(influorescence).
(iii) Lacks petals.
(iv) Has bracts.

(4f)
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1ai)
A- lives in stagnant water
B- lives in Leftovers food
1aii)
A- into mosquito
B- into fly
1aiii)
A-arthuropoda (phylum insecta (class)
B-arthuropoda (phylum insecta (class)

1bi)
specimen A
i)it has bristles
ii)it has horny jaw
iii)it has siphon
1bii)
specimen B
i)it has a hook
ii)it has mouth
iii)it has spiracle

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

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