WAEC (WASSCE) 2023 May/June BIOLOGY PRACTICAL QUESTIONS AND ANSWERS;-ExamgrandComNg

Biology Practical Questions;-ExamgrandComNg !!!!! 

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Biology practicals Essay;-ExamgrandComNg!!!!! 

((1a)
[TABULATE]

=SPECIMEN A=
(i) They are smaller in size
(ii) They have a thick shell
(iii) They have a gel-like texture

=SPECIMEN B=
(i) They are larger in size
(ii) They have a fragile shell
(iii) They have a smooth texture

(1b)
[TICK THE CORRECT OPTIONS]

=TYPE OF FERTILIZATION=
A – External ✔️
B – Internal ✔️
C – Internal ✔️

=REPRODUCTIVE PROCESS= 
A – Oviparous ✔️
B – Oviparous ✔️
C – Viviparous ✔️

(1ci)
A – Chordata
B – Magnoliophyta

(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

1ci) A= The matured catfish belongs to the phylum Chordata. 
D= The Pride of Barbados, also known as Dwarf Poinciana or Peacock Flower, belongs to the phylum Magnoliophyta, also known as Angiosperms or flowering plants.
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NO.2A

Biology practical 
2a. Specimen F, Panicum plant/Guinea grass, belongs to the class Magnoliopsida (dicotyledons).
II. The cocoyam plant or Caladium plant belongs to the class Magnoliopsida (dicotyledons).

2b. Specimen F, Panicum plant/Guinea grass, can be used to demonstrate the morphology and anatomy of monocotyledonous plants.
II. Specimen G (Caladium plant) can be used to demonstrate the morphological features of monocotyledonous plants.

2c. Specimen F, Panicum plant/Guinea grass, has a fibrous root system.
II. Specimen G(The cocoyam plant has a fibrous root system.

2d. 

2e. Specimen F, Panicum plant/Guinea grass, is of economic importance in the following ways:
1. It is used as a forage crop for livestock.
2. It is used as a cover crop to prevent soil erosion.
3. It is used as a biofuel crop to produce ethanol.

2fi. Four observable features of the cocoyam corm (specimen H) are:
1. It is a modified stem that is swollen and fleshy.
2. It has a brown, rough outer layer and a white, starchy inner layer.
3. It has several small, circular depressions on its surface where the roots emerge.
4. It has a pointed top where the stem emerges.

2fii. The biological significance of the cocoyam corm (specimen H) to the plant from which it was obtained is that it serves as a storage organ for the plant, providing nutrients and energy for growth and reproduction during times of stress or dormancy.

Specimen F; (Panicum)Panicum is a genus of grasses in the family Poaceae, commonly known as the grass family or true grasses. 

Specimen G; (Cocoyam) Cocoyam is a common name used to refer to several plants in the family Araceae, also known as the aroid family.
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(3ai)
L – Hesperidium
M – Drupe 
N – Berry

(3aii)
L – Perennial
M – Perennial
N – Annual

(3b)

(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)

OR

(3e)
(i) Disposal by seed
(ii) Axile 

(3ei) Man/animal 
(3eii) Axile placentation 

(3f) It serves as a natural occurring food additive

(3f) 
It serve as food

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