2026 NECO BIOLOGY PRACTICAL ANSWER



(1ai)
A – Pelvic girdle of rabbit
B – Cervical vertebra of rabbit
C – Caudal vertebra of rabbit
D – Transverse section of pawpaw fruit
E – Transverse section of guava fruit

(1aii)
A – Pelvic (hip) region.
B – Neck region.
C – Tail region.

(1aiii)
(i) Ilium
(ii) Ischium
(iii) Pubis

(1aiv)


(1av)
(PICK ANY TWO)
(i) It supports the head.
(ii) It protects the spinal cord.
(iii) It provides attachment for neck muscles.
(iv) It allows movement and flexibility of the neck.

(1bi)
D – Parietal placentation.
E – Axile placentation.

(1bii)
D – The seeds are attached to the inner wall of the ovary.

E – The seeds are attached to a central axis within the ovary.

(1c)


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(2ai)
F – Quill feather
G – Agama lizard
H – Rat
I – Quadrat
J – Sweeping net

(2aii)
(PICK ANY THREE)
(i) It aids flight.
(ii) It provides insulation to maintain body temperature.
(iii) It protects the body against injury.
(iv) It makes the body streamlined during flight.
(v) It helps in courtship display.
(vi) It prevents the body from getting wet.

(2aiii)
(PICK ANY THREE)
(i) Dry horny scales reduce water loss.
(ii) Strong limbs with sharp claws for climbing and running.
(iii) Long muscular tail for balance.
(iv) Well-developed eyes for good vision.
(v) Protective body colour for camouflage.
(vi) Strong jaws with sharp teeth for catching prey.

(2aiv)
G – Reptilia
H – Mammalia

(2av)


(2avi)
(PICK ANY THREE)
(i) Both possess two pairs of limbs.
(ii) Both are terrestrial vertebrates.
(iii) Both have well-developed eyes.
(iv) Both possess lungs for respiration.
(v) Both have tails.
(vi) Both have nostrils.

(2bi)
I:
(PICK ANY ONE)
(i) To estimate the population of plants in a given area.
(ii) To determine the distribution of plants or slow-moving animals.
(iii) To estimate the density of organisms in a habitat.

J:
(PICK ANY ONE)
(i) It is used for collecting insects from grasses and shrubs.
(ii) It is used for catching small flying insects in fields.
(iii) It is used for sampling insect populations for ecological studies.

(2bii)
(i) Throw or place the quadrat randomly on the study area.
(ii) Count all the organisms found within the quadrat.
(iii) Repeat the process at several points and calculate the average population or estimate the distribution.

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(3ai)
K - Housefly
L - Pride of Barbados fruit
M - Cashew nut
N - Millipede
O - Crab
P - Sorghum grain

(3aii)
(PICK ANY THREE)
(i) It has a proboscis modified into a sponging organ for sucking liquid food.
(ii) Its antennae are sensitive to smell, helping it detect food from a distance.
(iii) It secretes saliva to dissolve solid food before sucking it.
(iv) It has well-developed compound eyes for locating food easily.
(v) It has sticky pads and claws on its legs for clinging firmly to surfaces while feeding.

(3aiii)
(PICK ANY ONE)
(i) It transmits diseases such as cholera, typhoid fever and dysentery.
(ii) It contaminates food and drinking water with disease-causing organisms.
(iii) It causes food spoilage, resulting in economic losses.

(3bi)
K – Insecta
N – Diplopoda
O – Crustacea

(3bii)
K – Terrestrial habitat
N – Moist terrestrial habitat
O – Aquatic habitat

(3ci)
L - Legume
M – Nut
P – Caryopsis

(3cii)
L – Explosive dispersal.
M – Animal dispersal.

(3ciii)