2026 WAEC GCE FIRST SERIES BIOLOGY PRACTICAL

2026 WAEC GCE FIRST SERIES BIOLOGY PRACTICAL

2026 WAEC GCE FIRST SERIES BIOLOGY PRACTICAL QUESTIONS BELOW

2026 WAEC GCE FIRST SERIES BIOLOGY PRACTICAL

2026 WAEC GCE FIRST SERIES BIOLOGY PRACTICAL SOLUTIONS BELOW

(1ai)
Lateral view

(1aii)
Osteichthyes (Bony fish)

(1aiii)
(i)Possession of scales,
(ii)Possession of fins.
(iii) Possession of an operculum covering the gills.

(1bi)
I: Mouth
II: Eye
III: Operculum (Gill cover)
IV: Lateral line
V: Dorsal fin
VI: Caudal fin (Tail fin)
VII: Anal fin
VIII: Pelvic fin
IX: Pectoral fin
X: Gills (under the operculum)

(1bii)
III (Operculum): Protects the gills.
IV (Lateral line): Detects vibrations and pressure changes in the water.
VI (Caudal fin): Provides forward propulsion and steering.
VIII (Pelvic fin): Helps with balance, steering, and braking.
X (Gills): Site of gaseous exchange (oxygen uptake and carbon dioxide release).

(1c)
Aquatic (Water)

(1di)
(i) Mode of nutrition: Heterotrophic (Feeds on other organisms).

(1dii)
Shape: Streamlined (Fusiform).

(1e)
Water containing dissolved oxygen enters through the mouth and passes over the gills. Oxygen diffuses from the water into the bloodstream, while carbon dioxide diffuses from the blood into the water, which is then expelled through the opercular opening.

(1f)
This countershading provides camouflage. When viewed from above, the dark dorsal surface blends with the dark water/seabed, making it harder for predators to spot. When viewed from below, the bright ventral surface blends with the bright surface water/sky, making it harder for underwater predators to spot.

 

(2a)
(i) Division; Angiospermophyta (or Magnoliophyta)
(ii) Class; Monocotyledoneae (or Liliopsida)

(2b)
(i) Parallel venation in leaves
(ii) Fibrous root system
(iii) Adventitious roots present

(2ci)
I: Male flower (Tassel)
II: Leaf
III: Stem (Stalk/Culm)
IV: Female flower (Cob/Ear)
V: Grain (Seed/Kernel)
VI: Adventitious roots (Prop roots)
VII: Fibrous roots
VIII: Root hairs

(2cii)
Part I (male flower) produces pollen grains, which are transferred to part IV (female flower) through pollination. Fertilization then occurs, which leads to the development of part V (grain/seed) within the cob

(2d)
Monoecious

(2ei)
Wind

(2eii)
(i) The plant has exposed male and female flowers.
(ii) The plant does not have brightly colored petals or nectar to attract insects

(2fi)
Diagram

(2fii)
The magnification of the drawing is 3x (if the drawing length is 6 cm).

 

(3ai)
I: Seed,
II: Endocarp,
III: Mesocarp,
IV: Epicarp,
V: Ovules/Seeds,
VI: Pericarp/Fruit wall

(3aii)
I: Contains the embryo for germination/reproduction
II: Protects the seed/embryo
IV: Protects the inner parts of the fruit/seed
V: Develops into seeds

(3b)

(3ci)
: A: Marginal placentation
B: Marginal placentation

(3cii)
A (Marginal): Pea, Bean.

B (Marginal): Mango, Peach

(3d)
A: Wind (or mechanical dispersal)

B: Animals (specifically mammals/humans)

(3ei)
(i)Under; A; is a type of fruit that splits open to release its seeds, whereas Under B; is a seed is the reproductive unit within the fruit.
(ii)Under A; is to protect the seeds and aid in their dispersal, whereas Under B; a seed’s primary function is to grow into a new plant.
(ii)Under A; it develops from the ovary of a flower, while Under B; a seed develops from the ovule within the ovary.

(3eii)
(i)Both are part of the reproductive cycle
(ii)Both are found in flowering plant