Neco 2021 Biology Practical Question & Answer Now Available

*NECO BIOLOGY PRACTICAL SOLUTIONS*

(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 [https://i.imgur.com/e6qm39F.jpg]

(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.

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(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 [https://i.imgur.com/rvTyM1e.jpg]

(2cii)

In a tabular form

Under L

1. Have no wings to fly.

2. Has no snout.

Under M

1. Have wings for flying.

3. Has an elongated snout

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(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 [https://i.imgur.com/QL73x1P.jpg]

(3ci)

1 – Good source of animal protein as food

2 – Termites drive earthworms from soil that enchance soil fertility.

(3cii)

Soldier termites defend the nest from enemies and do protect the workers during food gathering.

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