WAEC 2022 Biology practicing Answer – May/June Expo

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(1a)
A: Annual crop
C: Annual crop

(1b)
TABULATE

=SPECIMEN A=
(i) Presence of hole
(ii) Brownish in colour
(iii) It is not wet
(iv) Presence of two leaves

=SPECIMEN C=
(i) Absence of hole
(ii) Whitish in colour
(iii) It is  wet
(iv) Absence of two leaves

(1c)
(i) Practising of crop rotation
(ii) Spraying with insecticides
(iii) Growing of resistance varieties

(1d)
A: Epigeal
B: Hypogeal

(1ei)
[img]https://i.imgur.com/CusGfrP.jpg[/img]

(1eii)
TABULATE

TEST: C + iodine solution

OBSERVATION: A blue-black colour is observed

INFERENCE: Starch is present

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(2ai)
D - Terrestrial (Termitarium)
E - Arboreal (Hive)

(2aii)
TABULATE:

Specimen D:
(i) Absence of stinger
(ii) Strong mandible for biting.
(iii) Absence of eyes
(iv) Absence of ocelli
(v) Absence of wings.

Specimen E
(i) Presence of stringer
(ii) Mandible is moderate.
(iii) Presence of eyes
(iv) Presence of ocelli
(v) Presence of wings.

(2aiii)
Both specimen D and E are social insects

(2bi) 
(PICK ANY TWO)
(i) It produces honey which serves as food
(ii) Honey being a product of bee, serves a great medicinal purpose 
(iii) It helps to pollinate flower.

(2ciii)
(i) Incisors - Grasping and pulling food into the mouth.
(ii) Premolars- Chewing food
(iii) Molar - Grinding up food

(2d) 
Heterotrophic (Herbivorous)

(2e)
(i) Presence of incisor for cutting leaves.
(ii) Presence of diastema which afford the chewing space.
(iii) Presence of sharp enamel ridges grind food as molar slide over each other.

(2e)
(i) Calcium
(iii) Phosphorus

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(3ai)
TABULATE

=SPECIMEN H=
(i) Presence of comb
(ii) Small in size

=SPECIMEN L=
(i) Absence of comb
(ii) Bigger in size

(3aii)
TABULATE

=SPECIMEN K=
(i) Absence of web foot
(ii) Presence of short and sharp claws

=SPECIMEN M=
(i) Presence of web foot
(ii) Presence of long and sharp claws

(3b)
=SPECIMEN H=
(i) Possession of eye for sight
(ii) Possession of comb for sensitivity 

=SPECIMEN M=
(i) Possession of web feet to float in water
(ii) Possession of sharp claws to scratch the soil

(3bi)
(i)Grains
(ii)Grass

(3c)
[Check the diagram]

(3d)
Woodland

(3e)
H - Pecking 
L - Pecking

(3fi)
- Pair eyes present
- Nostrils present

(ii) 
- Claws present
- Scales present

 COMPLETED

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