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NECO GCE 2023 BIOLOGY PRACTICAL ANSWERS – EXAMKING.NET
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BIOLOGY-PRACTICAL -ANSWERS
(1ai)
A – Butterfly
B – Spider
C – Scorpion
D – Grasshopper
E – Tridax fruit
(1aii)
A – Insecta
B – Arachnida
(1aiii)
COMPLETE THE TABLE:
Number of body division:
C – Two
D – Three
Type of mouth part:
C – Chewing
D – Biting and chewing
(1bi)
(i) Possession of exoskeleton
(ii) They have jointed appendages
(iii) They have segmented body
(1bii)
(i)
A – Three distinct body segments – head, thorax, and abdomen.
B – Divided into cephalothorax (combined head and thorax) and abdomen.
(ii)
A – It has six legs.
B – It has eight legs.
(iii)
A – It has two pairs of large, often colorful wings.
B – Absence of wings.
(iv)
A – It has long, slender antennae.
B – Absence of antennae.
(1biii)
A:
(i) It plays a crucial role in the pollination of flowering plants.
(ii) It is aesthetically pleasing and is often a focal point in ecotourism
B:
(PICK ANY TWO)
(i) They can be employed to control unwanted plant species, acting as a form of biological pest control.
(ii) They cause nutrient cycling by breaking down plants, fertilizing soils with their excreta and in turn facilitating plant growth.
(iii) They prevent overgrowth of plants and in turn protecting them for overcrowding and death
(1biv)
I – Pappus
II- Fruit stalk
(1bv)
(i) It is covered in a feathery appendage which helps the fruit to disperse by wind
(ii) It is small in nature
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(2ai)
Specimen F – Fish
Specimen G – Tadpoles
(2aii)
Pisces
(2aiii)
I – Operculum
II – Mouth
III – Scales
IV – Anal fin
V – Caudal fin
(2aiv)
I – It is used for respiration
II – For locomotion or movement
(2bi)
(i) Possession of scales
(ii) Presence of fins
(2bii)
TABULATE
=SPECIMEN F=
(i) Presence of pectoral fins
(ii) Presence of scales
=SPECIMEN G=
(i) Absence of pectoral fins
(ii) Absence of scales
(2ci)
(i) Possession of mouth for feeding
(ii) Possession of fins for locomotion
(iii) Possession of operculum for respiration
(iv) Possession of scales for temperature regulation
(2cii)
(i) Protein
(ii) Fats and oil
(2ciii)
Frog
(2civ)
Thyroxine
(2cv)
Possession of fins
(2)
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BIOLOGY PRACTICAL -QUESTIONS PAPERS
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NECO GCE 2023 BIOLOGY (PRACTICAL) Questions And Answers
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BIOLOGY PRACTICAL-Answers
(1a)
Specimen A: Land snail
Specimen B: Toad
Specimen C: Spider
Specimen D: Crayfish
(1aii)
(i) Shells are used as source of calcium for animal feeds.
(ii) Its also serve as a source of animal protein for man.
(1aiii)
TABULATE
=SPECIMEN A=
(i)They have a soft, slimy body with a coiled shell on their back.
(ii) They move by using a muscular foot that glides over a layer of slime they produce.
=SPECIMEN B=
(i)They do not have a shell, but their skin is thick and covered in warts or bumps.
(ii)They have muscular hind legs designed for hopping
(1aiv)
(i) It allows researchers and ecologists to understand its role in the ecosystem
(ii) It aids in conservation efforts and wildlife management.
(1av)
(i) Webbed Feet
(ii) Large Muscular Thighs
(1bi)
(i) Specimen B (Toad): Amphibia
(ii) Specimen C (Spider): Arachnida
(iii) Specimen D (Crayfish): Malacostraca
(1bii)
(i) Eight legs
(ii) Multiple eyes
(1biii)
(1biv)
(i) Camouflaged exoskeleton
(ii) Paddle-like appendages
(iii) Sensory adaptations
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(2ai)
E: Spirogyra filaments.
F: Mucor/Rhizopus.
G: Groundnut seedling (A week old).
H: Maize seedling (A week old).
I: Microscope.
J: Slide (plain).
(2aii)
E habitat: Freshwater.
F habitat: Damp and decaying organic matter.
(2aiii)
E mode of nutrition: Autotrophic (photosynthesis).
F mode of nutrition: Saprophytic (absorbing nutrients from dead organic matter).
(2aiv)
One reason for classifying E in
(i)is its habitat in freshwater.
(2b)
Mount E and F separately on J and use I to observe the setup.
(2bi)
Observable features of E:
(i) Green coloration.
(ii) Long, filamentous structure.
(iii) Presence of chloroplasts.
Observable features of F:
(i) Fuzzy, cotton-like appearance.
(ii) Rapid growth and spreading.
(iii) Formation of sporangia.
The observed color of E is green, and its role in life is photosynthesis.
(i)Colour: Green
(ii) Role: Photosynthesis
(2ci)
(i)Class of G: Angiospermae (Dicotyledonae).
(ii)Class of H: Angiospermae (Monocotyledonae).
(2cii)
(i) Specimen G: Groundnut seedling (A week old) : Hypogeal Germination
(ii) Specimen H: Maize seedling (A week old) : Epigeal Germination
(2ciii)
(i) Specimen G: Groundnut seedling (A week old): Reticulate venation
(ii) Specimen H: Maize seedling (A week old): Parallel Venation
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(3ai)
– Specimen K: Pigeon
– Specimen L: Agama Lizard
– Specimen M: Rat
– Specimen N: Tilapia
(3aii)
(i) Snout
(ii) Eyes
(iii) Ear
(iv) Throat Fan (Dewlap)
(3bi)
(i)Flight Adaptations: Pigeons have several adaptive features that allow them to excel in aerial life.
(ii)Wings: Pigeons have strong and well-developed wings with feathers that provide lift and control during flight.
(iii)Keen Vision: Pigeons have excellent eyesight, adapted for spotting distant objects and navigating over vast areas.
(iv)Homing Instinct: Pigeons possess a remarkable homing ability, enabling them to navigate and find their way back to their nests or designated locations over long distances.
(v)Crop Milk Production: Pigeons have a unique adaptation known as crop milk production.
(3bii)
TABULATE
=SPECIMEN K=
(i) Streamlined body shape
(ii) Possession of feathers
=SPECIMEN L=
(i) elongated body shape
(ii) Possession of scales
(3ci)
(i) Wings
(ii) Beak/Mouth Structure:
(3cii)
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BIOLOGY PRACTICAL-Specimen
Specimen A – Land snail
Specimen B – Toad
Specimen C – Spider
Specimen D – Crayfish
Specimen E – Spirogyra filaments
Specimen F – Mucor/Rhizopus
Specimen G – Groundnut seedling (A week old)
Specimen H – Maize seedling (A week old)
Specimen I – Microscope
Specimen J – Slide (plain)
Specimen K – Pigeon
Specimen L – Agama Lizard
Specimen M – Rat
Specimen N – Tilapia
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