This guide highlights the most likely practical specimens for the JUPEB 2026 Biology Practical Examination together with the important questions examiners may ask. It is designed to help students revise effectively and improve their performance in the practical examination.
Specimen O: Giant Land Snail (Achatina marginata)
Identification
Common name: Giant Land Snail
Scientific name: Achatina marginata
Classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
External Features and Their Functions
Shell : Protects the soft body from injury and drying out
Tentacles: Carry sensory organs and support the eyes
Eyes: Detect light and aid vision
Mouth: Used for feeding
Muscular Foot: Enables creeping movement
Mantle; Secretes and repairs the shell
Pneumostome: Opening used for gaseous exchange
Adaptations for Terrestrial Life
The giant land snail survives successfully on land because it possesses several adaptive features:
1. A muscular foot for locomotion.
2. A hard shell that prevents water loss and protects against predators.
3. A pneumostome for breathing atmospheric air.
4. Tentacles with eyes that help detect food and danger.
Economic Importance
Beneficial Effects
1. Helps decompose dead organic matter.
2. Improves soil fertility.
3. Enhances microbial activity in the soil.
Harmful Effects
1. Damages crops by feeding on leaves and seedlings.
2. Some species transmit disease-causing parasites.
3. Can harbour harmful microorganisms.
Practical Drawing
Specimen P: Cockroach (Periplaneta americana)
Identification
Common name: Cockroach
Scientific name: Periplaneta americana
Classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
External Features and Functions
* Antennae Detect touch, smell and vibrations
* Compound Eyes Vision
* Thorax Bears the legs and wings
* Abdomen Contains digestive and reproductive organs
* Wings Flight
* Legs Walking and running
* Spiracles Respiration
* Cerci Detect vibrations and danger
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Adaptive Feature
The cockroach is adapted for survival through:
1. Strong jointed legs for rapid movement.
2. Wings for short-distance flight.
3. Spiracles for gaseous exchange.
4. Sensitive antennae for detecting food and danger.
Comparison Between the Giant Land Snail and Cockroach
Specimen O (Snail) | Specimen P (Cockroach) |
Mollusc | Arthropod |
Soft body | Segmented body |
One muscular foot | Six jointed legs |
Shell present | Chitinous exoskeleton |
Two pairs of tentacles | One pair of antennae |
Creeping movement | Walking /running |
Radula present | Mandibles present |
Other comparison areas include habitat, body symmetry, body covering, locomotion, respiration and reproduction.
Specimen Q: Scapula
Identification
Scapula (Shoulder Blade)
Bone Type
Flat bone
Functions
The scapula:
1. Serves as an attachment for muscles.
2. Articulates with the humerus.
3. Protects part of the rib cage.
4. Assists shoulder movement.
5. Stabilizes the shoulder joint.
Features
Candidates should identify:
Spine
Glenoid cavity
Acromion process
Coracoid process
Joint Formed
Ball-and-socket joint with the humerus.
Specimen R: Pride of Barbados Fruit
Identification
Pride of Barbados Fruit
Classification
Fruit type: Simple fruit (Legume)
Nature: Dry dehiscent fruit
Characteristics
Develops from one ovary.
Splits open naturally when mature.
Contains several seeds.
Seed Dispersal
Method: Explosive dispersal.
Adaptation
When dry, the fruit splits suddenly, scattering the seeds away from the parent plant.
Specimen S: Moss Plant
Identification
Moss Plant
Division
Bryophyta
Characteristics
Non-vascular plant.
Lacks true roots, stems and leaves.
Grows in moist environments.
Reproduces by spores.
Has a dominant gametophyte generation.
Moss reproduces by sexually and asexually.
Sexual reproduction
During sexual reproduction, male organs (antheridia) produce sperm cells while female organs (archegonia) contain egg cells. Fertilization occurs in the presence of water, producing a zygote that develops into the sporophyte.
Asexual reproduction occurs through fragmentation and protonema formation.
Habitat
Mosses thrive in damp environments because water is essential for fertilization and growth.
Specimen T: Bread Mould
Identification
Bread Mould
Kingdom
Fungi
Observable Structures
Using a hand lens, identify:
Mycelium
Hyphae
Sporangium
Spores
Reproduction
Bread mould reproduces mainly by spores. Under favourable conditions, spores germinate into new hyphae. Sexual reproduction may also occur through conjugation in some species.
Importance
Beneficial Effects
Used in food production.
Produces useful antibiotics.
Decomposes dead organic matter.
Used in producing enzymes and organic acids.
Harmful Effects
Causes food spoilage.
Produces poisonous substances.
Causes diseases.
Damages books, clothes and stored materials.
Final Examination Tips
To perform well in the JUPEB Biology Practical Examination:
Learn the scientific names of common specimens.
Memorize classifications and important adaptive features.
Practice identifying external structures and their functions.
Revise specimen comparisons regularly.
Draw neat biological diagrams with correct labels.
Understand economic importance instead of memorizing only definitions.
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