NECO 2022 - BIOLOGY PRACTICAL  ANSWER



(1ai)
Specimen A - Microscope
Specimen B - A ripe mango fruit
Specimen C - Transverse section of a tomato fruit
Specimen D - Groundnut seed
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)


(1bii)
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.

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(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:
1. For feeling
2. For walking
3. For sight

(2bv)
(i) It serves as food for man
(ii) It serves a source of income

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(3ai)
J-Tilapia fish
K-Tadpole
L-Spider.

(3aii)
(i) Both have eyes
(ii) Both have mouths
(iii) Both have operculum

(3aiii)
Specimen J
1. Presence of fins
2. Presence of scales

Specimen K:
1. Absence of fins
2. Absence of scales

(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.