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Biology Practical Neco Answers 2022

Biology Practical Neco Answers 2022

(1a)

A; microscope

B; a ripe mango fruit

C; Transverse section of tomato fruit

D; Groundnut seed

E; maize grains

(1aii)

(i) objective lens

(ii) nose pierce

(iii) aperture

(1aiii)

It is use to magnify object that is to be viewed

(1bi)

[img]https://i.imgur.com/1n5WW0a.jpeg[/img]

(1bii)

Animals

(1biii)

(i)its flesh are eaten by animals

(ii)the seeds are passed out as waste by some animal

(1biv)

Tabulate;

Under B

(i)it is yellowish in colour

(ii)beans like shaped

Under C

(i)it is reddish in colour

(ii)not beans like shaped

(1ci)

Tabulate

Under Observation;

(i)light passes through it but the other side can not be seen

Under Conclusion;

(i)it contains oil which makes the paper a translucent material

(1cii)

Fats and oil

(1ciii)

It serves as food.

(2ai)

F; carrots

G; Irish potato

H; water Lily

I; prawn

(2aii)

It improve sight

(2aiii)

This is because it has a modified stem

(2aiv)

Tabulate

Under Observation;

(i)it gives a blue black colour

Under Conclusion;

(i)starch is present

(2bi)

(i)presence of big leaves

(ii)presence of cuticle

(iii)presence of horns

(iv)presence of rims

(2bii)

Crustacean

(2biii)

(i)presence of tail fin

(ii)presence of scales

(2biv)

Tabulate;

Under External features

(i)Tail fin

(ii) Antenna

(iii)legs/limbs

Under Function;

(i) Locomotion

(ii) sensitivity

(iii) locomotion

(2bv)

(i)it serves as food

(ii)it create employment opportunity

(3a)

J; Tilapia Fish.

K; Tadpoles

L; spider

(3b)

(3ci)

(i)Head

(ii)Cephalothorax

(3cii)

Arachnida

(3ciii)

(i)presence of wings

(ii)presence of book lung

(1ai)

Specimen A – Microscope

Specimen B – A ripe mango fruit

Specimen C – Transverse section of a tomato fruit

Specimen D – Groundnut seed

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Specimen E – Maize grain

(1aii)

1. Eye piece lens

2. Objective lens

3. Stage

(1aiii)

Specimen A is used to study small organisms and cells in the laboratory

(1bi)

Specimen B is dispersed by animals

(1biii)

1. It is edible.

2. it is brightly colored

(1biv)

In a tabular form:

Specimen B:

1. One seeded

2. Hard and woody endocarp

Specimen C.

1. Many seeded.

2. Fleshy endocarp

(1ci)

In a tabular form:

Experiment:

Observation: Spot becomes translucent.

Conclusion: Oil is present.

(1cii)

Fats and oil is present in specimen D.

(1ciii)

1. Specimen E is a source of food for man.

(2ai)

Specimen F – Carrot

Specimen G – Irish Potato

Specimen H – Water lily

Specimen I – Prawn

(2aii)

Vitamin A in specimen F helps to maintain healthy eyes, teeth, skeletal and soft tissue, mucus membranes and skin.

(2aiii)

It has a swollen root

(2aiv)

In a tabular form:

Experiment.

Observation: G turns blue black in colour.

Conclusion: Starch is present.

(2bi)

1. Presence of long petiole which supports the broad lamina on the surface of the water.

2. The upper surface of the leaf is waxy which prevents the clogging of the stomata.

3. Presence of well developed and numerous adventitious roots which anchors the plant firmly

4. Flowers are raised above water surface by long stalks for purpose of pollination

(2bii)

Specimen I belongs to the class of Crustacea.

(2biii)

1. It has two body regions.

2. It has a pair of antennae.

(2biv)

In a tabular form:

External feature:

1. Pair of antennae

2. Pair of legs

3. Stalked compound eyes.

Function:

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1. For feeling

2. For walking

3. For sight

(2bv)

(i) It serves as food for man

(ii) It serves a source of income

(3ai)

J-Tilapia fish

K-Tadpole

L-Spider.

(3aii)

(3aiii)

(3bi)

(3bii)

1. Possession of laterally flattened and streamlined body for easy movement in water.

2. Possession of pectoral and pelvic fins for slow movement, balancing and steering.

(3ci)

1. Prosoma

2. Opisthosoma (or abdomen)

(3cii)

Specimen L belongs to the class Arachnida.

(3ciii)

1. It has eight walking legs

2. It has eight simple eyes.

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