Biology for Exam Questions SS2 Third Term

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 exam questions for SS2 Third 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 Facebook. (Like and Follow Page)

Introduction to Biology as a School Subject

Biology is the branch of science that studies living things and their interactions with the environment. In school, it helps students understand the structure, functions, growth, reproduction, and adaptations of plants, animals, and microorganisms. By learning Biology, students develop observation, analytical, and problem-solving skills that are useful in everyday life and in careers like medicine, agriculture, and environmental science.

Biology Exam Questions for SS2 Third Term

Biology Exam Questions for SS2 Third Term are divided into two sections:

• Section A
• Section B

The first section, namely, Section A is the objective test, and students are expected to attempt all questions in the section. Section B is the theory part, and students are expected to follow specific instruction and answer the required number of questions.

Note that what you have below are SS2 Biology Third Term Exam Past Questions made available to assist students in their revision for 3rd term examinations and also teachers in structuring standard examinations.

SECTION A: Objectives

Instruction: Answer all questions in this section by choosing from the options lettered A—D. Each question carries equal marks.

1. Which part of the gill of fish is involved in gaseous exchange?
A. Gill slits
B. Gill bars
C. Gill covers
D. Gill filaments

2. The movement of diaphragm is characteristic of gaseous exchange in
A. insect        B. fish
C. toad          D. mammal

3. Which of the following structures of the human body provides the best surface for absorption?
A. skin              B. stomach
C. alveolus       D. oesophagus

4. The stomata of a leaf performs the same function as the
A. spiracle of insects
B. trachea of toad
C. pharynx of  man
D. scale of fish

5. Which of the following  will happen when  the volume of the thoracic cavity decreased?
A. air circulates well in the  lungs
B. the lungs expand
C. the ribs move upwards
D. the pressures within the lungs increases

6. A grasshopper respires by means of its
A. lung-book
B. gills
C. lungs
D. tracheal tube

7. Floating plants are called
A. zooplankton
B. newton
C. phytoplankton
D. benthons

8. The unique habitat created by mixing of fresh and salt water is
A. brackish        B. river
C. lake               D. ocean

9. Which of the following is an aquatic habitat?
A. desert        B. grassland
C. ocean        D. force

10. Which of the following is not a type of estuary?
A. tidal marshes
B. river mouth
C. embayment
D. pandanus

11. An aquatic habitat that is not moving is
A. lotic          B. lentic
C. bentic       D. netic

12. Epiphytes are usually found in _________  habitat
A. desert       B. marsh land
C. forest        D. grassland

13. Which of the following is a xeromorphic plant?
A. cactus
B. water leaf
C. water lily
D. balsam plant

14. The driest habitat is
A. desert                B. forest
C. savannah           D. swamp

15. Trees in the mangroves have
A. pnematophore        B. gametophyte
C. sporophyte              D. oocytes

16. A low and wet land habitat representing a transition between aquatic and terrestrial habitat is
A. marsh land
B. brackish
C. forest
D. desert

17. The tiny pore on which  on the leaves are called
A. stomata         B. lenticels
C.  suberin          D. wax

18. The largest and the deepest aquatic habitat among the following is
A. ocean         B. sea
C. lake            D. river

19. Which of the following ecological factors are common to both terrestrial and aquatic habitats?
A. rainfall, temperature, light and wind
B. salinity, rainfall, temperature and light
C. tides, wind, rainfall and altitude
D. pH, salinity, rainfall and humidity

20. The savannah is different from a rain forest by having trees
A. with fire-resistant thick bark
B. that are usually very tall
C. with thin barks
D. with broad leaves

21. Which of these food chains is not possible in a forest?
A. diatom—fly—toad—snake
B. fly—toad—snake—hawk
C. leaves –antelope—man—lion
D. leaves—caterpillar—bird—lion

22. A chain of events in which one community is gradually replaced by one another in an orderly manner is
A. population         B. ecosystem
C. succession         D. estuary

23. Which of the following will not affect population size?
A. predation
B. competition
C. immigration
D. none of the above

24. An adaptation to avoid over-crowding is
A. immigration
B. dispersal of seed
C. territorial behaviour
D. life cycle and life span

25. Which of the following biotic factors does not affect a population?
A. mortality          B. natality
C. predation         D. food

26. Which of the following food substances is digested in the stomach?
A. carbohydrate
B. fat and oil
C. fat and protein
D. protein

27. In the enzymatic reaction starch sugar, starch is referred to as the
A. substrate   B. product
C. enzyme      D. reaction mixture

28. If the gall bladder of a man is removed by surgical operation which of the following processes will be most seriously affected?
A. digestion of fat and oil
B. formation of urine
C. digestion of starch
D. conversion of protein

29. Which of the following organ  produces bile?
A. gall bladder     B. pancrease
C. stomach          D. liver

30. In the mammalian tooth, the pulp cavity contains
A. pulp
B. pulp like structure
C. cement
D. blood vessels

31. Lipids are emulsified by alkaline. This means that they are
A. split up into droplet
B. turned into fatty acids and glycerol
C. neutralized
D. turn into a base

32. What is the end product of digested protein?
A. peptone        B. polypeptide
C. glycerol         D. amino acid

33. Which of the following dental formulae represents the dentition in the rabbit?
A. I 2/1  C 0/0  P 3/2  M 3/3
B. I 2/2  C 1/2  P 2/2  M 3/3
C. I 1/2  C 0/0  P 2/3  M 3/3
D. I 2/1  C 0/1  P 1/2  M 2/3

34. Which of these is not a function of mammalian blood?
A. engulfing bacteria
B. production of hormones
C. transporting urea
D. transport of glucose

35. Blood clotting is initiated by
A. leucocytes
B. platelets
C. haemoglobin
D. erythrocytes

36. The circulatory system that does not allow the mixing of oxygenated and deoxygenated blood in a mammalian heart is referred to as
A. open         B. closed
C. single       D. haemocoelic

37. The bicuspid valve is located between the
A. left auricle and left ventricle
B. aorta and left ventricle
C. superior vena cava and inferior vena cava
D. right auricle and superior vena cava
E. right auricle and right ventricle

38. Which of the following is not a medium for transportation in living organism?
A. cytoplasm     B. blood
C. bones            D. lymph

39. Conjugation as a method of reproduction  does not occur in
A. hydra        B. spirogyra
C. mucor       D. rhizopus

40. The mode of asexual reproduction in spirogyra is
A. binary fission
B. fragmentation
C. sporulation
D. budding

41. Excretion is the process by which  organism
A. collect metabolic waste
B. remove unwanted water
C. remove undigested food from the body
D. get rid of metabolic waste

42. The cell division responsible the production of gametes is called
A. fragmentation     B. meiosis
C. mitosis                D. sporulation

43. The cell division responsible for growth is called
A. mitosis           B. binary fission
C. meiosis          D. conjugation

44. The tissues responsible for the transporting of mineral salt and water in a living plant is
A. cambium    B. xylem
C.phloem        D. sclerenchyma

45. The bone of the neck on which the skull rests on is known as
A. odontoid process
B. axis
C. occipital condyle
D. atlas

46. Two bones are joined together by
A. tendon           B. cartilage
C. ligament        D. synovial fluid

47. Which of these is not a tissue found in plants?
A. epidermis      B. phloem
C. xylem             D. dermis

48. If John has just eaten some maize with coconut, where will digestion begins in his alimentary canal?
A. esophagus      B. stomach
C. duodenum      D. mouth

49. In which of the following  groups of organisms are flagella and cilia found?
A. flatworm      B. coelenterates
C. protozoa      D. nematodes

50. Which of the following is the accessory organs of the digestive system ?
A. kidney       B. spleen
C. liver           D. lungs

51. Which of the following is not an organ?
A. Hair              B. Tongue
C. Rhizome       D. Corn
E. Heart

52. One major difference between Osmosis and Diffusion is that diffusion
A. does not need a semi–permeable membrane
B. does not take place in living tissues
C. takes place only in a liquid medium
D. takes place only in a gaseous medium
E. can not  be demonstrated experimentally

53. Which of the following can be used for vegetative propagation?
A. Ginger Stem
B. Yam Leaf
C. Plantain roots
D. Sweet Potato Tuber
E. Plantain roots

54. Which of the following is a method of artificial vegetative propagation?
A. Corn         B. Layering
C. Bulbil        D. Rhizome
E. Creeping stem

55. Which of the following is not a function of the blood?
A. Maintenance of body temperature
B. Formation of clot
C. Distribution of bile
D. Transportation of excretory materials
E. Distribution of hormones

56. Which of the following statements about the circulation of blood is not correct?
A. Deoxygenated blood flows into the heart through the Vena Cavae
B. Blood is pumped out of the heart through the aorta
C. Oxygenated blood from the lungs is carried to the left auricle
D. The Oxygenated blood enters the lungs through the pulmonary vein
E. Ventricles contract to pump blood into the aorta

57. A difference between the auricle and the ventricle of the mammalian heart is that the
A. Ventricles carry deoxygenated blood
B. Ventricles do not have outlets
C. Auricles have no Valves
D. walls of the ventricles are less muscular than that of the auricles
E. walls of the ventricles are more muscular than that of the auricles

58. Which of the following organisms respire through the surface?
A. Man         B. Fish
C. Tridax       D. Amoeba
E. Hibiscus

59. The stomata of a leaf perform the same functions as
A. Spiracles of Insects
B. Trachea of Toads
C. Pharynx of man
D. Liver of man
E. Scales of Fish

60. Which of the following does not happen during inspiration?
A. Intercostal muscles contract
B. Ribs move forward
C. Thoracic Cavity increases
D. Diaphragm Relaxes
E. Internal air decreases

SECTION B: Essay

INSTRUCTION – Answer all only three (3) questions in this section.

1a. Define external respiration.
b. List all structures involved in breathing in mammals.
c. Describe the process of inhalation.
d. State the structures for gaseous exchange in plants, toad, insects and crustacean.

2a. Make a well labeled diagram of respiratory system of man.
b. State five characteristics of a respiratory organ.
c. What is oxygen debt?
d. Explain the word “muscle fatigue”.

2a. What is marsh?
b. List two types of marshes.
c. State five characteristics of marsh.
d. Name two animals found in marsh.

3a. With or without diagram, describe the major ecological zones of the marine habitat.
b. What is estuarine habitat?
c. Mention two animals living in estuarine habitat.
d. Explain the effects of temperature and light in distribution of animals in marine habitat.
e. State two characteristics of marine.

4a. State two characteristics each of the plants community in tropical rain forest and savannah.
b. What is a forest?
c. Name two animals and two forest plant and state their adaptive features.

5a. Define succession.
b. Explain the following: (i) primary succession (ii) secondary succession.
c. List four factors responsible for over population.
d. State three causes of shortage of food.

Read Also: Biology Exam Questions for SS1 Third Term

Answers to Biology Exam Questions for SS2 Third Term

Answers to Section A (Objective Test)

The following table gives the correct answers to the objective section of Biology exam questions for SS2 Third term. If you are using a mobile device, hold the table and scroll to the right or left for a complete view.

So here you have the answers to the objective section of Biology Exam Questions for SS2 Third 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. External respiration is the exchange of gases (oxygen and carbon dioxide) between the alveoli of the lungs and the blood in the capillaries.

1b. Structures involved in breathing in mammals include: nostrils, nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, lungs, ribs, intercostal muscles, and diaphragm.

1c. During inhalation, the intercostal muscles contract, pulling the ribs upward and outward. The diaphragm contracts and flattens, increasing the volume of the thoracic cavity. This reduces the air pressure inside the lungs, causing air to flow in from the outside.

1d. Structures for gaseous exchange are:
i. Plants – stomata and lenticels
ii. Toad – skin and lungs
iii. Insects – spiracles and tracheae
iv. Crustacean – gills

2a. Diagram of respiratory system of man:

2b. Five characteristics of a respiratory organ:
i. Large surface area
ii. Moist surface
iii. Thin membrane
iv. Rich blood supply
v. Permeable to gases

2c. Oxygen debt is the extra oxygen required by the body after vigorous exercise to break down lactic acid and restore the body to normal conditions.

2d. Muscle fatigue is the temporary inability of a muscle to contract after prolonged activity due to accumulation of lactic acid.

3a. Major ecological zones of the marine habitat:
i. Littoral zone – shallow region near shore with abundant light and organisms.
ii. Neritic zone – extends from low tide mark to edge of continental shelf, rich in nutrients.
iii. Oceanic zone – deep open sea with fewer nutrients.
iv. Benthic zone – ocean floor where bottom-dwelling organisms live.

3b. Estuarine habitat is a coastal area where fresh water from rivers meets and mixes with salt water from the sea.

3c. Examples of animals in estuarine habitat: crabs and mudskippers.

3d. Temperature affects enzyme activity and metabolism, influencing where animals can live. Light determines depth of photosynthesis, influencing the distribution of producers and consumers.

3e. Two characteristics of marine habitat:
• High salinity
• Presence of waves and tides

4a. Characteristics of plant communities:
Tropical rainforest: tall trees with broad leaves; dense canopy.
Savannah: scattered trees; grasses dominate the vegetation.

4b. A forest is a large area covered chiefly with trees and undergrowth, forming a habitat for various organisms.

4c. Animals: chimpanzee (adapted for climbing with long arms), forest elephant (large ears for cooling).
Plants: mahogany (broad leaves for capturing sunlight), lianas (climbing stems to reach sunlight).

5a. Succession is the gradual and orderly change in species composition of a community over time.

5b.
(i) Primary succession – succession that begins on a bare surface where no life existed before.
(ii) Secondary succession – succession that occurs in an area where life previously existed but was disturbed or destroyed.

5c. Four factors responsible for overpopulation:
i. High birth rate
ii. Low death rate
iii. Immigration
iv. Improved healthcare

5d. Three causes of shortage of food:
i. Poor soil fertility
ii. Pests and diseases
iii. Drought

How to Pass Biology Exam Questions for SS2 Third Term

Passing your Biology exam questions for SS2 Third term requires a combination of preparation, understanding, and strategy. Here are actionable tips to help you excel:

1. Know the syllabus

List every topic set for the term. Tick each topic off as you finish it. Focus on what the exam will ask. Do not study what is not in the syllabus.

2. Learn important definitions and terms

Biology exams ask for short, exact answers. Memorize key definitions and scientific words. Practice writing them in one or two lines.

3. Practice diagrams

Draw and label common diagrams fast. Practice neat, clear labels. Diagrams often gain many marks. A good diagram can win the paper for you.

4. Use past questions

Solve past SS2 third term questions. Time yourself. Mark your answers and learn from mistakes. Past papers show how questions repeat and what examiners like.

5. Master practical skills

Know common practicals and their reasons. Learn how to record observations and write conclusions. Practical questions are predictable. Practice makes them easy.

6. Break hard topics into steps

If a topic seems difficult, break it into small parts. Study one part at a time. Repeat until it becomes simple.

7. Plan and manage time

Make a study plan and follow it. During the exam, read the paper first. Start with questions you know well. Give time to long questions so you don’t rush.

8. Answer clearly and briefly

Write only what the question asks. Use short sentences and bullet points where allowed. Label diagrams clearly. Examiners mark answers that are correct and neat.

9. Stay healthy and confident

Sleep well before the exam. Eat a light meal. Drink water. A calm mind remembers better. Trust your preparation.

10. Last-minute tips

• Revise key words and diagrams the night before.
• Do not try new topics on exam day.
• Check marks given to each question and plan your time.

Final note: Start early, practise daily, and keep mistakes as lessons. With steady effort you will pass. Believe in your work and stay focused.

It’s a wrap!

If you need more clarification on SS2 Third Term Questions on Biology, you can use the comments box below. We’ll be there to answer you asap.

Best wishes.