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NECO Biology OBJ and Theory Answers 2022

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(i) Setting up of national park and gardens to save wildlife in their natural environment.
(ii) Poaching i.e. uncontrolled and illegal killing of game should be prevented.
(iii) Avoiding the use of pesticides that may kill off many animals
(vi) Prohibiting deforestation and encouraging afforestation
Sexual reproduction involves the fusion of two gametes – male and female gametes during fertilization to form a zygote which develops into a new organism. It involves organisms of the same species.
Sexual reproduction is the fusion or joining of male and female gametes or nuclei from different individual to form a zygote which later develops into an embryo or organism.
(i) biceps (flexor)
(ii) Triceps (extensor)
– When one touches a hot object, the sensory receptor in the skin receives the stimulus
– An impulse is transmitted from the receptor to the spinal cord, via the dorsal root/sensory neurone
– The intermediate neurone in the spinal cord passes on the impulse to the motor neurone
– The motor neurone then sends the impulses to an effector organ (muscle) via the ventral root
– All the neurones are linked by synapses across which impulses are sent
– The muscle upon receiving the impulse contracts causing the hand to be withdrawn from the hot object
(Pick Any Three)
(i) It provides water for photosynthesis
(ii) To get rid of excess water in the plant
(iii) It helps plants to continually draw water from the soil into their stem and leaves.
(iv) Some evaporation of water uses latent energy from plants and therefore keeps the plant cool
(v) It helps in the transport of mineral salts from soil to leaves and growing points of the plant
(i) Growing of cover crops like grasses, sweet potato which covers the surface of the soil
(ii) Contour ploughing: ploughing along the contours of a slope to reduce the speed of runoff water.
Metamorphosis: This is the name given to the change in form shown by insects and amphibians from the egg stage to the adult stage.
(Pick Any Four)
(i) It regulate sex drive (libido)
(ii) It helps in the production of sperm
(iii) It helps in the production of red blood cells
(iv) It is responsible for muscle mass and strength
(v) Cause an increase in bone mass
(vi) Responsible for fat distribution
(Pick Any Four)
(i) It deaminates excess amino acid to urea
(ii) It stores iron from broken down cells
(iii) It detoxified poisonous substances and sent to the kidney for excretions
(iv) It supplies heat to the body by its metabolic reactions
(v) It also store fats and releases it at controlled rates into the blood when the need arises
(vi) It stores and releases minerals (iron, copper and potassium and vitamins (A, D and B12)
(Pick Any Three)
(i) Oxygen (only in the day)
(ii) Carbon dioxide (only at night)
(iii) Water
(iv) Tannins
(v) Alkaloids
(vi) Resins
(vii) Latex
(viii) Gum
– The semi-circular canals in the inner ear are responsible for the maintenance of balance with respect to circular motion.
– There are three semi-circular canals and each is found in one of the geometrical planes (right angle to each other)
– During spinning, the gelatinous cupula in one of the semi-circular canals is set in motion.

– This stimulates the sensory hairs, and impulses are sent through the auditory nerves to the brain for proper body posture.
– When one stops spinning, the gelatinous cupula does not stop moving instantly but continues to move for some time
– This cause the continue feeling of the sensation of spinning
(i)Buccal respiration
(ii)Lung respiration
(iii)Skin respiration
(i) The flowers are not attractive
(ii) The pollen grains are not sticky
(i) The flowers are attractive
(ii) The pollen grains are sticky
(i)Parietal placentation.
(ii) Basal placentation.
Light rays from an external object is refracted by the cornea, aqueous humour, the lens and the vitreous humour. The lens act as the fine adjustment bringing the rays to a focus on the retina. The image formed on the retina of human are inverted and diminished. The brain receives the stimulus via the optic nerves and then interprete it.
(i)Parasitic nutrition
(iii)Carnivorous nutrition

(i) Internal fertilization
(ii) External fertilization
– After fertilization, the zygote divides repeatedly and develops into an embryo which consists of the plumule, radicle and one or two cotyledons.
– The primary endosperm nucleus develops into a nutritive tissue called endosperm, which stores food used by the developing embryo
– The synergids and the antipodal cells degenerate
– The ovule changes to form the seed and the interguments form the seed coat
– The micropyle remains where air and water enter the seed.
– The ovary develop into the fruit and the ovary wall forms the fruit wall called the pericarp.
– The style shrivels off, the petals, sepals and the stamens wither and fall off
(i) Red blood cells
(ii) White blood cells
(iii) Blood plasma
(iv) Platelets
(i)They are proteinous in nature
(ii) They speed up the rate of chemical reaction
(iii) They are organic catalyst
(iv) They are specific in function
Mendel’s first law also known as the law of segregation of genes states that during gamete formation, two alleles at a gene locus segregate from each other and each gamete has an equal probability of containing either allele

(i)Bush burning
(i)Seasonal migration




NECO Biology Practical Specimen Answers 2022


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Specimen B is dispersed by animals
1. It is edible.
2. it is brightly colored
In a tabular form:
Specimen B:
1. One seeded
2. Hard and woody endocarp
Specimen C.
1. Many seeded.
2. Fleshy endocarp
In a tabular form:
Observation: Spot becomes translucent.
Conclusion: Oil is present.
Fats and oil is present in specimen D.
1. Specimen E is a source of food for man.
Specimen F – Carrot
Specimen G – Irish Potato
Specimen H – Water lily
Specimen I – Prawn
Vitamin A in specimen F helps to maintain healthy eyes, teeth, skeletal and soft tissue, mucus membranes and skin.
It has a swollen root
In a tabular form:
Observation: G turns blue black in colour.
Conclusion: Starch is present.
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.
Specimen I belongs to the class of Crustacea.
1. It has two body regions.
2. It has a pair of antennae.
In a tabular form:
External feature:
1. Pair of antennae

2. Pair of legs
3. Stalked compound eyes.
1. For feeling
2. For walking
3. For sight
(i) It serves as food for man
(ii) It serves a source of income
J-Tilapia fish
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.
1. Prosoma
2. Opisthosoma (or abdomen)
Specimen L belongs to the class Arachnida.
1. It has eight walking legs
2. It has eight simple eyes.






NECO 2021 Biology OBJ answers


Here is complete Answers 

5 August  2021 Biology OBJ Answers

Biology – OBJ



(i) To search for food.
(ii) Escape predators.
(iii) Find mates for reproduction.
(iv) To disperse/reduce competition/overcrowding by moving to new locations.

Phloem: Responsible for the transportation of enzymes/hormones.

Leaf: is used for photosynthesis

Xylem; is to transport water from roots to stems and leave

Flower; is for reproduction in plant

(i)Low water requirements
(ii)No leaves or small number of leaves
(iii)Possession of thorn or needles

(i)it provides new cells for growth
(ii)for replacement of worn-out cells

An image is formed on the retina with light rays converging most at the cornea and upon entering and exiting the lens. Rays from the top and bottom of the object are traced and produce an inverted real image on the retina. The distance to the object is drawn smaller than scale.

(i)Evidences from Palaeontology
(ii)Evidences from Comparative Morphology
(iii)Evidences from taxonomy

(i)Eye lids

Excretion is the removal of waste products of metabolism which are harmful or would in time interfere with the normal functions of the organisms

Competition is an interaction between a number of the organisms of the same or different species for resources in limited supply such as food, water , space and light

Deforestation is the extensive cutting down of trees for the purpose of either farming it firewood or mining thereby exposing the top soil to agents of erosion


(iii)Dehydration or drying of foods

(i) Meiosis : four daughter cells
(ii) Mitosis: two identical daughter cells

(i)It reduces the risk of diseases from parents to offsprings
(ii)It create diversity and variation among populations

The relationship is known as commensalism in which the remora fish gains while he shark neither gain nor loose. In this case, the remora fish attach itself to the shark which transport it round the water protecting it form predators and it also obtain it’s food through the process. The shark on the other hand neither gain or loose.

(i)High fever
(ii)Sore throat
(iii)dry cough

It carries filtered blood from the kidney’s to the posterior vena cava

Ecological niche: This is the exact position by an organism in a particular habitat

Population density: This can be defined as the total number of organism per unit area of the habitat

Climax community: This is established when a stable or unchanging community is attained, thus the community is in equilibrium with the environment

Aestivation is the mode of arrangement of sepals or petals in the floral bud with respect to the other members of the same whorl.

(i)Nose for smelling
(ii)Eyes for seeing
(iii)Tongue for tasting
(iv)Ear for hearing

When a person spin around rapidly, that liquid in the inner ear spins as well. When the person stops spinning the liquid keeps moving for a bit, confusing your brain into thinking that the person is still spinning even when the person is standing still and that causes the feeling dizziness after spinning around the stationary object.

Neuron; transmit information to other nerve cells, muscle, or gland cells.

cerebrum; initiates and coordinates movement and regulates temperature

Mendulla Oblongata; passes messages between your spinal cord and brain.

cerebellum; coordinates voluntary movements

(i)tropic the effect is more or less permanent while Nastic movements are temporary and reversible.

(ii)Stimuli for the tropic movements are unidirectional and never diffuse while The stimuli for the Nastic movements may be unidirection or diffuse.

(4Ci) (cont.)

(iii)Movement in tropic movements is directional while Nastic movements is non directional

(i)Contains chlorophyll Absorbs light

(ii)Stomata Allows carbon dioxide to move by diffusion into the leaf

(iii)Guard cells To open and close the stomata depending on the conditions

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NECO Biology Practical Specimen 2021


  • SPECIMEN A – Atlas vertebra
  • SPECIMEN B – Thoracic vertebra
  • SPECIMEN C – Scapula
  • SPECIMEN D – Lumbar vertebra
  • SPECIMEN E – Pooter
  • SPECIMEN F – Sweep net
  • SPECIMEN G – Tridax fruit
  • SPECIMEN H – Tad pole
  • SPECIMEN I – Spirogyra (filaments)
  • SPECIMEN J – Okro fruit
  • SPECIMEN K – Mango fruit
  • SPECIMEN L – Tick
  • SPECIMEN M – Bean weevil
  • SPECIMEN N – Cactus plant
  • SPECIMEN O – Water lettuce
  • SPECIMEN P – Soldier termite (mandibulate)

New NECO Fishery Practical Specimen 2021/2022 & NECO Fishery Practical Questions & Answers


NECO Biology Practical Answers for July 22 (2021)


NECO 2021 Complete Correct Answers

NECO Biology Practical Answers (2021)


A – Alas Vertebra
B – Thoracic Vertebra
C – Scapula
D – Lumbar Vertebra


A – Neck Region
B – Chest Region
C – Shoulder Region
D – Upper Abdomen


(To be Tabulated)
Under Specimen A
(1) It has short neural Spine

(2) Verterbrabeteria Canal is present

Under Specimen D
(1) It has no board and neural Spine
(2) Verterbrabeteria Canal is present


1. They both have neural canal
2. They bother poseses centrum


I – Spirogyra
J – Okro fruit
L – Tick
M – Bean Weevils


1. Their bodies are characterised by multicellular filaments

2. It is an unbranched filamenterous
alegae occurring in stagnant water.


Under Specimen K
1. Seed are small
2. Many seeded
3. Anile placentation

Under Specimen K
1. Seed is large
2. One seeded
3. Basal placentation


L – class arachnid
M – class insect


L – Causes stress in animal affected by bites, blood looses that lead to anemia and even death

M – They makes holes in the plants to oviposition the causing directed and indirect damage


Diagram of Specimen K

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Under Specimen L
1. Pear shaped body
2. Approximately 3 to 5 mm in length to age species

Under Specimen M
1. General compact and oral in shape
2. Size range from 1 to 22mm


N – Cactus plant
O – Water lettuce
P – Soldier Termite


N – Terestial habitat l forest
O – Aquatic habitat
P – Teresterial habitat


Adaptive Features of Specimen N (Cactus)

1. Presence of spines to reduce water loses

2. Presence of succulent sterms to consume water
Presence of thick and waxy skin to reduce loss of water

Adaptive Features of Specimen O (Water lettuce)

1. Presence of air
for bouyancy

2. Presence of numerous root or absorption
mineral salt

3. Presence of more stomata on upper surface for diffusion of CO2


Diagram of Specimen P


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1. It increases humus content of the soil
2. It increases penetration of water in the soil by burrowing


1. Defending the Colony against enemies.


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NECO Practical Questions and Answers (2020)


Specimen; A is yam tuber
Specimen; B is cassava tuber
Specimen; C is quadrant
Specimen; D is insect net
Specimen; E is rain guage
Specimen; F is rice grain
Specimen; G is dry groundnuts seed

Specimen; A is propagated from small tubers
Specimen; B is propagated by stem
Specimen; F is propagated by seeds

Specimen; C is used for for study of the distribution of an item over a large area.
Specimen; D is used for prevention against insects
Specimen; E is used to measure the precipitating rain

Diagram of insect net.

(i)The surface of B turn blue-black
(ii)starch is present

Specimen; F grains (cereals)
Specimen; G puises (legume)

(i)The paper appears translucent
(ii) Specimen; G contain fat and oil or fat and oil is present in specimen G

Fat and oil

Specimen; H is contour feather
Specimen; I is quill feather
Specimen; J is Filoplume
Specimen; K is millipede
Specimen; L is centipede

(i)They provide insulation to birds
(ii)Feathers allow for flight
(iii)Feathers are used for defense
(iv)Feathers are used for camouflage


Diagram of specimen I.

(i)Specimen; H serve as aerodynamic
devices for flight
(ii)Specimen; J are used principally as insulation, to conserve body heat.

Specimen; K belong to the class Diplopoda
Specimen; L belong to the class Chilopoda.

In tabular form
-Specimen; K-
(i)millipedes are more rounded.
(ii)Millipedes have two sets of legs per segment positioned directly under their body.

Specimen; L-
(i)centipedes have a flatter body
(ii)Centipedes have one set of legs per segment positioned on the side of their body.

Specimen; M is Grasshopper
Specimen; N is spider
Specimen; O is Larva (house fly)
Specimen; P is Larva ( mosquito)
Specimen; Q Flame of The forest flower
Specimen; R hibicuss flower.

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