General Biology Practical II — 2025 Past Questions

University of Ilorin BIO108: 26 questions.

Topics: Dissection and histology of animal tissues, Types of fruits and seeds, Anatomy of flowering plants, Care and use of dissecting kits and biological wares, Identification of organisms in the animal kingdom

1. Which principle does the frog nerve-muscle experiment reliably demonstrate?
   1. Nerve regeneration
   2. All-or-none principle
   3. Synaptic delay
   4. Neuroplasticity
2. What developmental insight is gained from studying vertebrae in vertebrates?
   1. Muscle attachment points
   2. Formation of neural tubes
   3. Axial skeleton patterning
   4. Number of ribs
3. What is the average time for the onset of fatigue in frog muscles during an experiment?
   1. 1–3 minutes
   2. 3–5 minutes
   3. 5–10 minutes
   4. More than 10 minutes
4. What is the typical voltage threshold to produce a single twitch in a frog muscle?
   1. 3–5 volts
   2. 1–2 volts
   3. 5–10 volts
   4. 10–15 volts
5. What is the shape of the frog's stomach?
   1. J-shaped
   2. L-shaped
   3. S-shaped
   4. U-shaped
6. What is the function of the spiral valve in the conus arteriosus of a frog's heart?
   1. It minimizes the mixing of oxygenated and deoxygenated blood
   2. It enhances blood pressure
   3. It stores oxygen
   4. It regulates heartbeat
7. Which muscle in the frog is responsible for jumping movements?
   1. Biceps femoris
   2. Gastrocnemius
   3. Sartorius
   4. Adductor longus
8. What is the largest internal organ in a rat?
   1. Kidney
   2. Heart
   3. Liver
   4. Lungs
9. Which of the following is found in the female reproductive system of mammals?
   1. Testes
   2. Prostate gland
   3. Uterine horns
   4. Bulbourethral gland
10. Why is vivisection considered outdated in modern biological research?
    1. It gives inaccurate results
    2. It has been replaced by anesthesia protocols
    3. It's time-consuming
    4. It cannot be documented
11. What is another name for microscopic anatomy?
    1. Gross anatomy
    2. Morphology
    3. Histology
    4. Cytology
12. Which instrument is commonly used during gross dissection?
    1. Microtome
    2. Forceps
    3. Centrifuge
    4. Spectrophotometer
13. Which of the following is a tweezer-like tool used for handling delicate tissues?
    1. Scalpel
    2. Forceps
    3. Needle probe
    4. Pipette
14. Which of the following is a dry indehiscent fruit?
    1. Achene
    2. Legume
    3. Capsule
    4. Follicle
15. What type of fruit splits open when it matures?
    1. Fleshy fruit
    2. Dry dehiscent fruit
    3. Dry indehiscent fruit
    4. Aggregate fruit
16. Which fruit has a thick leathery rind with many oil glands in its epicarp?
    1. Pepo
    2. Hesperidium
    3. Drupe
    4. Berry
17. Which of the following fruits develops from an inferior ovary?
    1. Orange
    2. Apple
    3. Mango
    4. Tomato
18. Which of these is an example of a false fruit?
    1. Apple
    2. Mango
    3. Guava
    4. Banana
19. What is the name of the outermost covering that protects a seed?
    1. Endosperm
    2. Seed coat
    3. Testa
    4. Pericarp
20. The pericarp of a fruit is divided into how many layers?
    1. 2
    2. 3
    3. 4
    4. 5
21. Which part of a peach is the edible portion?
    1. Endocarp
    2. Mesocarp
    3. Epicarp
    4. Seed
22. Isobilateral leaves are typically found in which group of plants?
    1. Dicotyledons
    2. Monocotyledons
    3. Gymnosperms
    4. Pteridophytes
23. Which meristematic tissue is responsible for secondary growth in plants?
    1. Lateral meristem
    2. Apical meristem
    3. Intercalary meristem
    4. Protoderm
24. Which two types of cells make up sclerenchyma tissue?
    1. Tracheid and parenchyma
    2. Tracheid and sclereid
    3. Collenchyma and fibre
    4. Vessel and fibre
25. Which plant tissue is thin-walled and responsible for photosynthesis and storage?
    1. Collenchyma
    2. Parenchyma
    3. Xylem
    4. Sclerenchyma
26. Bundle sheath cells surround which plant structure?
    1. Stomata
    2. Vascular bundles
    3. Root hairs
    4. Apical meristem

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