You’re welcome to our school exams series where we provide you with termly examination questions in different subjects. In today’s post, we will focus on Biology exam questions. We will cover Biology Mock Exam Questions for SS3 Second Term with Answers. This means that we’ll be providing you with answers to the questions at the end. Also, you will get a few success tips on how to pass Biology examinations with flying colors. Remember to use the comments sections if you have questions, and don’t forget to join our Free Online Tutorial Classes on YouTube. (Subscribe to the Channel)
Table of Contents
Introduction to Biology as a School Subject
Before we venture into Past Biology Mock Exam Questions for SS3 Second term, here’s a brief introduction to the subject:
Biology, as a school subject, is the study of life and living things. It focuses on plants, animals, humans, and microorganisms. Through Biology, students learn how life processes work, how living organisms interact with their environment, and the role they play in maintaining balance in nature. It is a subject that connects directly to everyday life, making it both interesting and practical for students.
Biology Exam Questions for SS3 Second Term
Biology Mock Exam Questions for SS3 Second Term are divided into two parts:
- Part 1
- Part 2
The first part, namely, Part 1 is the objective test, and students are expected to attempt all questions in the part. Part 2 is the theory part and is divided into two sections.
Note that what you have below are SS3 Biology Second Term Exam Past Questions made available to assist students in their revision for 2nd term examinations and also teachers in structuring standard examinations.
PART 1: OBJECTIVE TEST
Instruction: Answer all questions in this section by choosing from the options lettered A—D. Each question carries equal marks.
1. Which of the following groups of animals do not possess a nervous system?
(a) Porifera
(b) Cnidaria
(c) Platyhelminthes
(d) Nematoda
2. The structural similarities in Paramecium and Euglena are in the
(a) shape of locomotory organs
(b) blunt anterior and pointed posterior
(c) presence of micro and mega nuclei in both
(d) presence of anterior and posterior contractile vacuoles.
3. Which of the following organisms cannot exist freely on its own?
(a) Chlamydomonas (b) Amoeba
(c) Paramecium (d) Plasmodium
The diagram below is an illustration of an Arthropod. Study it and answer question 4
4. The Arthropod in the diagram is not an insect because it
(a) has a big head which is almost equal to the thorax
(b) has eight legs and no wings
(c) does not have visible eyes on its head
(d) has head, thorax and abdomen
5. Which of the following cell organelles is the site for the production of ATP?
(a) Lysosome (b) Nucleus
(c) Mitochondrion (d) Ribosome
6. An example of osmosis in plants is the
(a) movement of water through the xylem
(b) loss of water vapour from the stomata
(c) translocation of food through the phloem
(d) absorption of water from the soil by the root
7. The organism that can carry out both autotrophic and heterotrophic modes of nutrition is
(a) Chlamydomonas (b) Endorina
(c) Euglena (d) Spirogyra
The diagram below illustrates a part of the human skeleton. Study it and answer questions 8 to 10.
8. The diagram represents the bones of the
(a) upper arm
(b) lower arm
(c) upper leg
(d) lower leg
9. Which of the labelled parts articulates with the head of the cochlea to form a hinge joint?
(a) I (b) II
(c) III (d) IV
10. The labelled part that provides surface for the attachment of the triceps is
(a) I (b) II
(c) III (d) IV
11. The diagram below illustrates the transverse section of a
(a) dicotyledonous root
(b) monocotyledonous root
(c) dicotyledonous stem
(d) monocotyledonous stem
12. Which of the following actions does not occur during exhalation in man?
(a) Thoracic cavity decreases in volume
(b) Diaphragm flattens
(c) Ribs move down and in
(d) Air pressure increases in the thoracic
The diagram below is an illustration of the urinary tubule in a mammal. Study it and answer questions 13 to 15.
13. Which of the following substances is found in the part labelled II only?
(a) Lipid (b) Protein
(c) Salts (d) Water
14. The part which contains lowest concentration of urea is labelled
(a) I (b) II
(c) III (d) IV
15. Which of the following substances is greater in concentration in the part labelled IV when compared to the part labelled I?
(a) Lipid (b) Glucose
(c) Urea (d) Uric acid
16. Deamination of amino acids in the liver produces
(a) blood sugar
(b) glycogen
(c) bile
(d) urea
17. Which of the following glands also serves as an exocrine gland?
(a) Ovary (b) Pancreas
(c) Adrenal (d) Thyroid
18. Which of the following sequences is the correct route of the transmission of impulses along a reflex arc?
(a) Receptor → sensory neurone → synapse → intermediate neurone → synapse motor neurone → effector
(b) Receptor → motor neurone → synapse → intermediate neurone → synapse → sensory neurone → effector
(c) Effector → intermediate neurone → synapse → motor neurone → synapse → sensory neurone → receptor
(d) Effector → motor neurone → synapse → sensory neurone → synapse → intermediate neurone → receptor
19. When viewing an object that is close to the human eye, the
(a) eye lens becomes thin
(b) ciliary muscles relax
(c) suspensory ligaments become taut
(d) eye lens become fat
The diagram below is an illustration of the
. Study it and answer questions 20 and 21.
20. The part labelled I is the
(a) acrosome (b) nucleus
(c) mitochondrion (d) tail
21. The function of the part labelled II is to
(a) fuse with the ovum during fertilization
(b) generate the energy for the sperm to swim to the fallopian tube
(c) help the sperm to swim forward
(d) dissolve the membrane of the egg during fertilization
22. Which of the following types of placentation is not common amongst syncarpous pistils?
(a) Marginal (b) Axile
(c) Parietal (d) Free central
23. The complex energy-rich organic matter which living organisms need for life is
(a) water (b) air
(c) food (d) mineral salts
24. Which of the following processes are associated with photosynthesis? I. Energy from sunlight is absorbed II. Carbon dioxide is evolved III. Oxygen is given off IV. Glucose is synthesized.
(a) I and II only
(b) I, II and IV only
(c) I, III and IV only
(d) I, II, III and IV only
25. Which of the following function is associated with calcium in plants?
(a) Formation of cell wall
(b) ribosomes
(c) proteins
(d) cell membrane
The diagrams below are illustrations of the 
. Study them and answer questions 26 to 28.
26. The dentition belongs to a
(a) rabbit (b) cat
(c) frog (d) man
27. The function of the teeth labelled X is for
(a) biting and grasping
(b) chewing and grinding
(c) tearing and grasping
(d) chewing and tearing
28. The teeth which are absent in the young of the organism are labelled
(a) W (b) X
(c) Y (d) Z
29. The number of individuals that the environment can support over a long period of time is its
(a) growth rate
(b) total capacity
(c) population capacity
(d) carrying capacity
30. A good site for secondary succession would be
(a) a sand dune
(b) a bare rock
(c) a land that has just had forest fire
(d) a stretch of barren land
31. A population which exceeds its carrying capacity and then collapses is represented graphically by a
(a) bell-shaped curve
(b) linear curve
(c) sigmoid curve
(d) skewed curve
32. The natural dwelling place of an organism is called is
(a) ecological niche
(b) habitat
(c) population
(d) environment
33. Which of the following ecological factors will result in food shortage?
(a) Drought
(b) Low rate of reproduction
(c) Emigration
(d) Topography
34. Soil permeability refers to
(a) how easily water passes through the soil
(b) the proportion of air in the soil
(c) the proportion of water the soil holds
(d) how well water rises up the soil
35. Which of the following groups of organisms do not have members that can be called autotrophs?
(a) Protists (b) Mosses
(c) Chlorophyta (d) Fungi
36. Which of the following pyramids gives the most accurate picture of the relationships between the organisms at the various trophic levels in a food chain?
(a) pyramid of numbers
(b) energy
(c) biomass
(d) size
37. Which of the following statements is not associated with pyramids of energy?
(a) Efficiency of energy transfer between trophic levels can be studied
(b) Comparisons of pyramids for different ecosystems can be made
(c) More accurate comparisons of trophic levels
(d) Representation of numbers of organisms at different trophic levels.
38. Which of the following materials is not easily biodegradable?
(a) Polythene bag
(b) Cotton bag
(c) Hides and skin bag
(d) Paper bag
39. Which of the following pairs of organisms is in a mutualistic relationship?
(a) Hydra and Sea anemone
(b) Hermit crab and sea anemone
(c) Dodder plant and Cocoa plant
(d) Mistletoe and Kolanut
40. The establishment of game reserves and parks is a method of
(a) conserving natural resources
(b) cultivating game
(c) controlling pollution
(d) cultural awareness
41. Which of the following practices is not used in conserving water?
(a) Afforestation (b) Damming
(c) Deforestation (d) Reforestation
42. Which of the following resources cannot be renewed?
(a) Air (b) Petroleum
(c) Food crop (d) Soil
Use the diagram below to answer question 43
43. The type of 
illustrated above is
(a) continuous variation
(b) discontinuous variation
(c) morphological variation
(d) environmental variation
44. Which of the following characters is not a morphological variation?
(a) shape of the nose
(b) colour of skin
(c) colour of hair
(d) tongue rolling
45. An apple plant can produce sexually and asexually, and it has 40 chromosomes in its leaf cells. How many chromosomes would be in each gamete and somatic cell?
(a) 20 chromosomes in the gametes and 10 in the somatic cells
(b) 40 chromosomes in the gametes and 20 in the somatic cells
(c) 20 chromosomes in the gametes and 40 in the somatic cells
(d) 40 chromosomes in the gametes and 40 in the somatic cells
46. Assuming that A is the gene for normal skin colour and is dominant, while a is the gene for the albinism and its recessive, what is the likely genotype of the couple which had 50% normal and 50% albino offspring?
(a) AA, aa (b) Aa, aa
(c) AA, Aa (d) Aa, Aa
47. Which of the following statements is true about mutation?
(a) phenotype is not involved
(b) genotype is not involved
(c) Artificial induction is not possible
(d) Genotype is involved
48. One of the structural adaptations of mammals for movement on land is the development of the
(a) hollow bones
(b) pentadactyl limb
(c) fused thoracic bones
(d) streamlined body
49. Which of the following traits is not characteristics of social insect?
(a) All members are identical
(b) There is division of labour
(c) the members dwell in the same habitat
(d) some members protect the queen
50. The gradual cumulative, adaptive and heritable changes in an organism over a long period of time resulting in new species is called
(a) adaptation
(b) survival
(c) organic evolution
(d) interspecific competition
PART 2: THEORY QUESTIONS
SECTION A
1a(i) List three forms in which living cells exist
(ii) Give one example each of the forms listed in 1(a)(i)
(b) Make a diagram, 6 cm – 10 cm long, of a typical plant cell and label fully
(c) In a tabular form, state three differences between a plant cell and animal cell.
(i) State three similarities between a plant cell and animal cell.
2. (a) In sequence, name the organs that constitute the alimentary canal of human.
(b) State:
(i) Three structural differences
(ii) Three structural similarities; between the alimentary canal of a bird and human.
(c) Explain briefly how the dentition of herbivores is adapted for feeding.
(d) State two roles of the pancreas in digestion.
3. (a) (i) What is a habitat?
(ii) Explain briefly three roles of a decomposer in an ecosystem.
(b) Explain briefly energy flow in a freshwater habitat.
(c) (i) State three harmful effects of microorganisms to plants.
(ii) State six beneficial effects of microorganism to humans.
4. (a) (i) Explain the term agglutination as used in blood transfusion.
(ii) The table below represents blood transfusion between blood donors and recipients. Copy and complete the table using the keys (+) to represent compatibility and (-) to resent incompatibility.
D o n o r |
| Recipient | |||
| A | B | AB | O | |
A |
|
|
|
| |
B |
|
|
|
| |
AB |
|
|
|
| |
O | + |
|
|
| |
(b) Explain how each of the following organisms are adapted for obtaining food.
(i) Mosquito larva;
(ii) Dodder plant;
(iii) Grasshopper
SECTION B
5. (a) State two differences between tactic and nastic movements in plants.
(b) Give two examples each of organisms that show:
(i) tactic movement
(ii) nastic movement
(c) (i) State three ways of caring for the mammalian skin.
(ii) List three stimuli to which the mammalian skin is sensitive.
(d) State five effects of high temperature on a terrestrial habitat.
(e) (i) What is courtship behaviour in animals?
(ii) List three courtship behaviours in animals.
(f) Name three organisms that carry out holozoic mode of nutrition.
(g) Explain briefly how fingerprinting can be used to detect crime.
Remember to use the comments sections if you have questions, and don’t forget to join our Free Online Tutorial Classes on YouTube. (Subscribe to the Channel)
Answers to Biology Mock Exam Questions for SS3 Second Term
Answers to Section A (Objective Test)
The following table gives the correct answers to the objective section of Biology exam questions for SS3 Second term. If you are using a mobile device, hold the table and scroll to the right or left for a complete view.
| Q.No | Ans | Q.No | Ans | Q.No | Ans |
|---|---|---|---|---|---|
| 1 | A | 2 | D | 3 | D |
| 4 | B | 5 | C | 6 | D |
| 7 | C | 8 | B | 9 | B |
| 10 | B | 11 | D | 12 | B |
| 13 | B | 14 | A | 15 | C |
| 16 | D | 17 | B | 18 | A |
| 19 | D | 20 | B | 21 | B |
| 22 | A | 23 | C | 24 | C |
| 25 | A | 26 | D | 27 | C |
| 28 | B | 29 | D | 30 | C |
| 31 | D | 32 | B | 33 | A |
| 34 | A | 35 | D | 36 | B |
| 37 | D | 38 | A | 39 | B |
| 40 | A | 41 | C | 42 | B |
| 43 | B | 44 | D | 45 | C |
| 46 | B | 47 | D | 48 | B |
| 49 | A | 50 | C |
There you have the answers to the objective section of Biology Exam Questions for SS3 second term. Use the comments section to let me know if you have any questions you would want me to clarify or discuss further.
Answers to Section B (Theory)
1a(i) Forms in which living cells exist:
- Unicellular form
- Colonial form
- Multicellular form
1a(ii) Examples:
- Unicellular – Amoeba
- Colonial – Volvox
- Multicellular – Human being
1b Diagram of a typical plant cell:
(Students should draw a neat diagram showing the following labelled parts: cell wall, cell membrane, cytoplasm, nucleus, nucleolus, chloroplast, vacuole, mitochondrion, endoplasmic reticulum and Golgi body.)
1c Differences between plant cell and animal cell:
| Plant Cell | Animal Cell |
|---|---|
| Has a cell wall | No cell wall |
| Contains chloroplast | No chloroplast |
| Has a large central vacuole | Has small or no vacuole |
1d(i) Similarities between plant and animal cells:
- Both have a nucleus
- Both contain cytoplasm
- Both are enclosed by a cell membrane
2a Organs of the human alimentary canal in sequence:
Mouth → Oesophagus → Stomach → Small intestine → Large intestine → Rectum → Anus
2b(i) Structural differences between bird and human alimentary canal:
- Birds have a crop; humans do not
- Birds have a gizzard for grinding food; humans do not
- Birds lack teeth; humans have teeth
2b(ii) Structural similarities:
- Both have oesophagus
- Both have stomach
- Both have intestines
2c Dentition of herbivores:
Herbivores possess broad, flat molars for grinding plant materials and well-developed incisors for cutting vegetation. Canines are absent or reduced.
2d Roles of the pancreas in digestion:
- Secretes digestive enzymes such as amylase, lipase and protease
- Produces bicarbonate to neutralize acidic chyme
3a(i) Habitat:
A habitat is the natural environment where an organism lives.
3a(ii) Roles of decomposers:
- Break down dead organisms
- Recycle nutrients back into the soil
- Maintain ecological balance
3b Energy flow in freshwater habitat:
Energy flows from the sun to producers (aquatic plants), then to primary consumers (herbivores), secondary consumers (carnivores), and finally to decomposers. Energy decreases at each trophic level.
3c(i) Harmful effects of microorganisms to plants:
- Cause plant diseases
- Reduce crop yield
- Lead to plant death
3c(ii) Beneficial effects to humans:
- Used in food production (bread, yoghurt)
- Production of antibiotics
- Nitrogen fixation
- Waste decomposition
- Sewage treatment
- Production of vitamins
4a(i) Agglutination:
Agglutination is the clumping of red blood cells when incompatible blood groups are mixed during transfusion.
4a(ii) Blood transfusion compatibility table:
| Donor \ Recipient | A | B | AB | O |
|---|---|---|---|---|
| A | + | – | + | – |
| B | – | + | + | – |
| AB | – | – | + | – |
| O | + | + | + | + |
4b Adaptations for obtaining food:
- Mosquito larva: Has mouth brushes for filtering food particles in water
- Dodder plant: Has haustoria to absorb nutrients from host
- Grasshopper: Possesses strong mandibles for chewing leaves
5a Differences between tactic and nastic movements:
- Tactic movement is directional; nastic movement is non-directional
- Tactic movement depends on stimulus direction; nastic does not
5b(i) Organisms showing tactic movement:
- Euglena
- Chlamydomonas
5b(ii) Organisms showing nastic movement:
- Mimosa pudica
- Venus flytrap
5c(i) Care of mammalian skin:
- Regular bathing
- Proper nutrition
- Avoiding harsh chemicals
5c(ii) Stimuli detected by skin:
- Heat
- Touch
- Pain
5d Effects of high temperature on terrestrial habitat:
- Increased evaporation
- Water loss in organisms
- Wilting of plants
- Reduced soil moisture
- Migration of animals
5e(i) Courtship behaviour:
Activities performed by animals to attract mates before reproduction.
5e(ii) Examples:
- Dancing in birds
- Singing
- Display of bright colours
5f Organisms with holozoic nutrition:
- Human
- Amoeba
- Dog
5g Fingerprinting in crime detection:
Each individual has unique fingerprint patterns. These prints found at crime scenes are compared with suspects to identify the offender.
How to Pass Biology Exam Questions for SS3 Second Term
Passing Biology at this level is not about reading plenty books alone. It is about reading the right way and understanding how examiners set their questions. If you follow the guide below with discipline, your performance will improve.
1. Understand Key Topics First
Focus on important areas like cell structure, genetics, ecology, digestion, excretion, and reproduction. These topics come out every year. Do not just read them—understand them well.
2. Read with Diagrams
Biology is not complete without diagrams. Practice drawing and labeling diagrams like the heart, kidney, plant cell, and alimentary canal. In the exam, a neat diagram can earn you extra marks.
3. Study Past Questions Seriously
This is one secret many students ignore. Past questions show you how examiners repeat topics. Practice at least the last 5–10 years. You will begin to notice patterns.
4. Master Biological Terms
Many students fail because they cannot define terms correctly. Learn standard definitions for words like diffusion, osmosis, habitat, mutation, and evolution. Keep your definitions short and accurate.
5. Practice Objective Questions Daily
Objective questions test your speed and accuracy. Practice multiple-choice questions every day. This will help you avoid confusion during the exam.
6. Learn How to Answer Essay Questions
Do not write everything you know. Go straight to the point. Use bullet points where necessary. If a question says “state,” do not explain. If it says “explain,” give clear and simple explanations.
7. Use Simple and Clear English
Big grammar is not needed. What matters is clarity. Write your answers in simple sentences that the examiner can easily understand.
8. Revise Regularly
Do not wait until exams are close. Revise your notes every week. What you revise often stays longer in your memory.
9. Manage Your Time in the Exam Hall
Do not spend too much time on one question. Answer the ones you know first, then come back to the difficult ones.
10. Believe in Yourself
Confidence matters. Go into the exam hall with the mindset that you will succeed. Fear can make you forget what you have already studied.
It’s a wrap!
If you need more clarification on SS3 Second Term Questions on Biology, you can use the comments box below. We’ll be there to answer you asap. Don’t forget to join our Free Online Tutorial Classes on YouTube. (Subscribe to the Channel)
Best wishes from yours sincerely, HD.
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