WAEC 2023 BIOLOGY PRACTIAL QUESTIONS ANSWERS
Identification of specimens
BIOLOGY PRACTICAL 2023 SPECIMEN
Specimen A – Mature fresh eggs of catfish
Specimen B – Fresh egg of domestic fowl (raw, with shell intact)
Specimen C– Picture/model/chart of uterus containing a foetus
Specimen D – Longitudinal section of ovary of pride of Barbados flower
Specimen E – leaf of pride of Barbados flower
Specimen F – Panicum plant/Guinea grass (whole plant)
Specimen G – Cocoyam plant/Caladium plant (whole plant)
Specimen H – Corm of cocoyam
Specimen J– Dry humus in a beaker
Specimen K– Moist humus in a beaker
Specimen L– Ripe orange fruit (whole)
Specimen M – Longitudinal section of coconut fruit
Specimen N – Longitudinal section of fresh chilli pepper fruit.
(b) it is essential that each candidate should be provided with the following materials;
I. hand lens/magnifying lens;
II. scalpel/razor blade/knife;
III. pair of forceps;
IV. hand gloves;
V. spatula;
VI. Petri dish;
VII. Fehling’s solutions A and B;
VIII. Iodine solution
QUESTION 1
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questions below
(1a)
(PICK ANY THREE)
=SPECIMEN A=
(i) Small in size
(ii) Soft shell
(iii) Transparent or translucent, with a pale yellow or amber tint
(iv) Spherical in shape
=SPECIMEN B=
(i) Large in size
(ii) Hard shell
(iii) Brownish
(iv) Oval shape
(1b)
-Specimen A is external and Oviparous
-Specimen B is internal and Oviparous
-Specimen C is internal and Viviparous
(1c)
A – Chordata
B – Angiosperm
(1cii)
A -Pisces
B – Aves
C – Mammalia
D – Dicotyledon
(1d)
It helps in reproduction
(1e)
TABULATE
=OBSERVABLE FEATURES=
(i) Air Space
(ii) Yolk
(iii) Albumen
=FUNCTIONS=
(i) Respiration
(ii) It provides nutrition
(iii) It serves as reservoir
(1f)
A – Aquatic
B – Terrestrial
D – Terrestrial
(2a)
F – Dicotyledon
G – Monocotyledon
(2b)
F – It has two seed leaves
G – It has one seed leaf
(2c)
F – Tap root
G – Fibrous root
(2di)
[img]https://i.imgur.com/DFxZDZ2.jpeg[/img]
(2dii)
Petiole – It attracts the leaf to the rachis
Leaflet – For photosynthesis
Midrib – It hold the Vien
(2e)
(i) It serves as cover crop
(ii) It serves as food to livestocks
(iii) It prevent erosion
(2fi)
(i) Possession of node
(ii) Possession of adventitious root
(iii) Possession of scale leaf
(iv) Possession of internode
(2fii)
For reproduction
(3ai)
L – Hesperidium
M – Drupe
N – Berry
(3aii)
L – Perennial
M – Perennial
N – Annual
(3bi)
TABULATE
=SPECIMEN L=
(i) Round and small in size
(ii) Axile placentation
(iii) Yellowish in colour
(iv) Succulent
=SPECIMEN M=
(i) Large and elongated
(ii) Parietal placentation
(iii) Brownish in colour
(iv) Hard
(3bii)
TABULATE
=SPECIMEN L=
(i) Yellow in colour
(ii) Big in size
=SPECIMEN N=
(i) Reddish in colour
(ii) Small in size
(3c)
(i) They both have axile placentation
(ii) Both have mesocarp
(iii) Both have seed
(3d)
[img]https://i.imgur.com/We2WdTt.jpeg[/img]
(3e)
(i) Disposal by seed
(ii) Axile
(3f)
It serve as food
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