2021/2022 NECO EXPO RUNZ : BIOLOGY PRACTICAL QUESTIONS AND ANSWERS NOW AVAILABLE

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*NECO BIOLOGY PRACTICAL SOLUTION*

*(Number 1)*
(1ai)
A – Atlas Vertebra.
B – Thoracic vertebra.
C – Scapula.
D – Lumber vertebra.

(1aii)
A – Neck
B – Thorax
C – Pectoral girdle.
D – Abdomen

(1aiii)
In a tabular form
Under A
(1)Reduced Neural spine.
(2)Centrum Absent.

Under D
(1)Neural spine broad and massive.
(2)Centrum present and well developed.

(1aiv)
(1)Both B and d have no vertebraterial canal.
(2)Both have prominent Neural spines.

(1b)
Draw the diagram.

(1ci)
E – Pooter
F – Sweep net
G – Tridax fruit.
H – Tadpole

(1cii)
E – used for sucking in of tiny invertebrates such as insects from leaves.
F – Used for capturing flying insects such as butterfly.

(1ciii)
G is dispersed by wind.

(1civ)
(1)Sticky secretion for clinging to submerged vegetation.
(2)Skin and external gills for respiration.
(3)Tail for swimming.

*(Number 2)*

(2ai)
I – Spirogyra
J – Okro fruit.
K – Mango fruit.
L – Tick
M – Bean weevil.

(2aii)
(1)Cup shaped chloroplasts.
(2)Green, with cylindrical cells.

(2bi)
In a tabular form
Under J
(1)Dry dehiscent fruit
(2) Many seeded.
(3)Dispersal by explosion.

Under K
(1) Succulent fruit.
(2)One seeded.
(3)Dispersal by animal.

(2bii)
L – Arachnida.
M – Insecta.

(2biii)
L – Blood sucking of ticks causes irritation.
M – Feed on seeds thereby reducing the quality and value of the beans.

(2ci)
Draw the diagram

(2cii)
In a tabular form
Under L
(1)Have no wings to fly.
(2)Has no snout.

Under M
(1) Have wings for flying.
(2) Has an elongated snout

*(Number 3)*

(3ai)
N – Cactus plant.
O – Water lettuce.
P – Soldier termite.

(3aii)
N – Dry or arid land(terrestrial)
O – Fresh water swamp(aquatic)
P – Soil or wood.

(3bi)
N
(1)Thick succulent stems for storing water.
(2) Spikes protect cast from animals.
(3) Thick, waxy skin to reduce loss of water and to reflect heat.

O
(1)Tiny hairs on the roots and leaves helps it to float.
(2)Waxy leaves which help water run off easily.
(3)Hairy leaves trap air bubbles, making it survive oxygen deficient mediums.

(3bii)
Draw the diagram

(3ci)
(1)Good source of animal protein as food
(2)Termites drive earthworms from soil that enhance soil fertility.

(3cii)
Soldier termites defend the nest from enemies and do protect the workers during food gathering.

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