WAEC 2022 - BIOLOGY PRACTICAL  ANSWER


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

(1b)
TABULATE

SPECIMEN A:
(i) Presence of hole
(ii) Brownish in colour
(iii) It is dry
(iv) It is hard when touched

SPECIMEN C:
(i) Absence of hole
(ii) Whitish in colour
(iii) It is wet
(iv) It is soft when touched

(1c)
(PICK ANY THREE)
(i) Proper storage of produce
(ii) Practising of crop rotation
(iii) Spraying with insecticides
(iv) Growing of resistance varieties
(v) Proper drying after harvesting


(1d)
A: Epigeal
B: Hypogeal

(1ei)


(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 (Beehive)

(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

(2di)
Heterotrophic (Herbivorous)

(2dii)
(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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(3)