NECO Biology Practical Questions and Answers 2022/2023 (Complete Solution)

NECO Biology Practical questions and answers 2022. Many NECO candidates find it difficult to answer the NECO Practical Biology correctly due to not understanding the questions. I will show you the best way to answer NECO Biology Practical questions PDF and make a good NECO result in your Biology examination.

You need to understand the NECO Biology Practical making scheme before attempting any question so as to present your answers in such a way that it will look attractive to the examiner to earn you big marks.

Bear in mind that every single procedure is awarded marks. So, ensure you do not skip any step while reporting and presenting your practical results. And do not forget to remember that neat labeling is very important.

You will be expected to carry out an experiment and report your observation. What you will see will not be far from the NECO Biology Specimen given to your school.

NECO Practical Biology Questions and Answers (Expo)

Note: The 2022 NECO Practical Biology answers (expo) will be posted here during the NECO Biology Practical exam. Keep checking and reloading this page to know when the answers are posted. Do not forget to reload this page in order to see the answers.

NECO Biology Practical Answers 2022 Loading…

(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.

(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

(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.

————————————————–

NECO Bio Practical Practice Questions

The questions below are for practice, not the 2022 Biology Practical questions.

1. (a) (i) Phylum of specimens C/Butterfly and E/Grasshopper: Arthropoda

(ii) Reasons for the answer in 1 (a)(i): (I) Metameric segmentation/segmented bodies: (II) Jointed appendages; (III) presence of chitinous exoskeleton/exoskeleton made of chitin; (IV) Bilateral symmetry.

(b) differences between

(i)

C/Butterfly	D/Caterpillar
Wings present	Wings are absent
Proboscis present	Mandibles are present
Proleg absent	Mandibles are present
Legs are longer	Legs are shorter
Claspers are absent	Claspers are present
Has one pair of compound eyes	Has simple eyes
Has antennae	Absence of antennae
Osmeterium absent	Osmeterium present

(ii)

C/Butterfly	E/Grasshopper
Presence of proboscis	Presence of mandibles
Clubbed/rounded/knobbed antennae	Not clubbed/rounded/knobbed antennae/tapering antennae;
Wing is membreneous/soft	Harder/less membraneous wings/forewings are leathery
Surface of wing is powdery/have scales/eye spots	Surface of wing is not powdery/absence of scales/eye spots;
Hind limbs/legs smaller/shorter/less muscular	Hind limbs/legs/larger and elongated/more muscular
Abdomen is hairy	Abdomen is not hairy/smooth

(c) Relationship between specimens C/Butterfly and D/Caterpillar:

(i) C/butterfly is the adult/image of D/Caterpillar

(ii) D/Caterpillar is the larva/larva stage of C/Butterfly

(d) (i) Habitat of specimen D/Caterpillar: Garden/Citrus leaves/vegetables/leaves/fruits/green plant has three pairs of true legs with claws for locomotion. (III) it has claspers; for attachment to vegetation/twid; (IV) presence of four pairs of prologs/false legs: for climbing; (V) its coloured pattern; enables it to blend with its environment/camouflages/escape predators; (VI) it has spiracles; for gaseous exchange, (VII) it has simple eyes for vision (VIII) has osmeterium; as defense mechanism/which emits foul smell to scare away predators.

(e) Diagram/drawing of dorsal view of specimen C/Butterfly

2(a)observable features of biological importance in

Specimen F/Carrot: (i) Main root/tap root/swollen/root tuber; (ii) Presence of lateral roots; (iii) Presence of short stem (green) ; (iv) Presence of foliage leaves; (v) Part of main root tapering

Specimen G/Irish potato: (i) Swollen stem/stem tuber; (ii) Bud(s)/ eye; (iii) Lenticels; (iv) scale leaf; (v) adventitious roots(s)

(b) (i) Classification of (I) Specimen F/Carrot: Root tuber; (II) Specimen G/Irish Potato: Stem tuber. Stem (above the swollen tap root). Specimen G/Irish Potato: Swollen, Stem/tuber; presence of bud(s)/eye; presence of scale leaves/leaf; presence of lentice(s).

(c) Class of specimen H and J: insect

(d) (i) Observable differences between specimen H and J.

H/Adult mosquito	J/Adult cockroach
Smaller in size	Big/large in size
A pair of wings	Two pairs of wings;
Absence of hard hind wing	Presence of hard hind wing/elytra;
Shorter antennae	Longer antennae
Proboscis	Mandible
Absence of maxillary palp/maxilla	Presence of maxillary palp/maxilla
Thin legs	Thick/large legs;
Absence of spines on legs	Presence of spine on legs.

(ii) Similarities between specimens H/adult mosquito and J/adult cockroach:

(i) Presence of a pair of compound eyes
(II) Body is divided into three divisions/head, thorax and abdomen
(iii) three pairs of/six(walking) legs
(IV) presence of jointed appendages
(V) presence of a pair of membraneous wings
(VI) Presence of a pair of antenna
(VII) Both have exoskeleton made of chitin
(VIII) Segmented Body.

(i) Feeding Habit of Specimen H/adult mosquito: Piercing and sucking. Specimen J/adult cockroach: Biting and chewing

(ii) Observing features used for feeding in specimen J/adult cockroach: Mandible; maxillae; labrum

4.  (a) (i) Phylum of Specimen R/Earthworm: Annelida

            (ii) Reasons for the classification of Specimen R/Earthworm:

(I) Presence of metameric segmentation/segments are separated from each other (by septa
(II) They are bilaterally symmetrical
(II) Segments are separated from each other
(IV) Presence of chaetae
(V) Body is covered by thin collagen cuticle
(VI) body is long and cylindrical.

(iii) Habitat of Specimen R/Earthworm:

(I) Under decaying leaves
(II) Wet/moist soil
(III) In open savanna/savannah beneath tall grasses
(IV) In the forests in decaying tree-stumps.

(b) (i) Features of adaption of Specimen R/Earthworm:

(I) Bristle like Caetae/seatea; for locomotion
(II) Mosit skin; for gaseous exchange
(III) Pointed anterior; for burrowing into the soil
(IV) Slimy body; reduces friction during movements
(V) Citellum; for attachment during exchange of sperms/reproduction/secretes cocoon (in which it eggs are deposited).

(ii) Economic importance of Specimen R/Earthworm:
(I) it aerates the soil
(II) it enriches/improves soil fertility
(III) its secretions neutralize the acid soil
(IV) Used as bait for fishing
(V) As food for some birds.

(c) Diagram/Drawing of the dorsal view of Specimen R/Earthworm

(d) Type of fruit: Specimen S/unripe mango fruit – Drupe, Specimen T/tomato fruit – Berry.

(e) (i) Observable differences between Specimens S and T

Specimen C/Unripe Mango Fruit	Specimen T/tomato Fruit
Green in colour	Red/Yellow in colour
One seeded	Many seeded
Stony/hard endocarp	Fleshy/Succulent/Soft endocarp
Fibrous mesocarp	Succulent mesocarp
Seed large	Seed(s) small;
Basal placentation	Axile placentation
Mesocarp and endocarp are fused	Mesocarp had endocarp are not fused

(ii) Similarities between specimens S and T:

(I) Both have seeds

(II) both are fruits

(III) Both have three layers/epicarp/mesocarp/endocarp/pericarp/fruit wall

(IV) Coloured epicarp/pericarp

(V) Both have placenta

(VI) Both have thin epicarp

(VII) both have fleshy mesocarp.

If you have any questions about the NECO Biology Practical, kindly let us know in the comment box.

Last Updated on July 19, 2022 by Admin