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Waec 2018 Biology Practical Answers / 2018 Biology Practical Waec Expo



Waec 2018 biology Practical Answers

2018 Waec Biology Practical Questions And Answers Expo Posted Here, WASSCE 2018 Biology Practical Answers May/June Expo, Waec 2018 Biology Practical Answers

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1ai)
A- water
B- decaying plant and animal matter
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1aiii)
A) A phylum is Artropoda, class is insecta
B- phylum is Artropoda, class is insecta
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1b)
A)
i) well developed head with mouth brushes
ii) on large thorax with no legs
iii) segmented abdomen

B)
i) reduced head
ii) legless
iii) mouth parts at the pointed end
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1c) in tabular form
A-
I) mosquito larvae can only survive in water
ii) well developed head
iii) mouth part in sucking

B
i) maggots do not need a water habitat to survive
ii) reduced head
iii) mouth parts for biting and chewing

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1cii)
i) both are legless
ii) both have thorax
iii) both have mouth parts

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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

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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)
SPECIMEN K
(i) it has flower stalk
(ii) it has petal
(iii) it has a style
(iv) it has receptacle

SPECIMEN L
(i) it has root
(ii) it has leaves
(iii) it has a stem
(iv) it has a bud

(4f)
DRAWING

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