Frequently Asked Questions About This Topic
What are the likely NECO 2026/2027 Further Mathematics questions?
How do I pass NECO Further Mathematics with a good grade?
What topics does NECO Further Mathematics cover?
Introduction
Further Mathematics is taken by students who plan to study Engineering, Mathematics, Physics, Computer Science, or other technical fields at university. It builds on the foundation of core Mathematics and introduces more advanced topics such as calculus, vectors, complex numbers, and statistics at a higher level. The subject is demanding, but students who work consistently and master the rules for each topic find it entirely manageable. This article gives you 50 objective questions with correct answers and 5 theory questions with detailed working. Show all your steps in theory answers. Examiners award marks at every stage of working, so a fully correct method earns marks even if a calculation error appears at the end.
NECO Further Mathematics Syllabus Breakdown for 2026/2027
Further Mathematics covers: Algebra including polynomials, rational functions, and partial fractions. Sequences and series including arithmetic, geometric, and binomial series. Matrices and determinants. Trigonometry including compound angles and the general solution of equations. Calculus including differentiation and integration. Coordinate geometry of circles and conic sections. Vectors in two and three dimensions. Complex numbers. Statistics and probability at a higher level. Mechanics including kinematics, Newton’s laws, and moments.
50 Objective Questions and Answers
1. Find the derivative of y = 3x^2 + 5x – 2
A. dy/dx = 6x + 5 ✓
B. dy/dx = 3x + 5
C. dy/dx = 6x – 5
D. dy/dx = 5x + 3
2. The sum of the first n terms of an arithmetic progression is given by:
A. S = n/2(a + l) ✓
B. S = a(r^n – 1)/(r – 1)
C. S = n(a + d)
D. S = a/(1 – r)
3. Evaluate the integral of 4x^3 with respect to x
A. x^4 + C ✓
B. 4x^4 + C
C. x^4/3 + C
D. x^3 + C
4. The roots of x^2 – 5x + 6 = 0 are:
A. 2 and 3 ✓
B. 1 and 6
C. 2 and -3
D. -2 and 3
5. Find the gradient of the curve y = x^2 – 4x at x = 3
A. 2 ✓
B. 3
C. 1
D. 4
6. The modulus of the complex number 3 + 4i is:
A. 5 ✓
B. 7
C. 3
D. 4
7. A geometric progression has first term 2 and common ratio 3. Find the 4th term.
A. 54 ✓
B. 18
C. 6
D. 27
8. Resolve (5x + 1) / ((x+1)(x-1)) into partial fractions. The value of A in A/(x+1) + B/(x-1) is:
A. 3
B. 2
C. -3 ✓
D. -2
9. Find the determinant of the 2×2 matrix with rows [3, 2] and [1, 4]
A. 10 ✓
B. 8
C. 14
D. 12
10. The binomial expansion of (1 + x)^4 gives how many terms?
A. 3
B. 4
C. 5 ✓
D. 6
11. Differentiate y = sin(x) with respect to x
A. cos(x) ✓
B. -cos(x)
C. sin(x)
D. -sin(x)
12. The equation of a circle with centre (2, 3) and radius 5 is:
A. (x-2)^2 + (y-3)^2 = 25 ✓
B. (x+2)^2 + (y+3)^2 = 25
C. (x-2)^2 + (y-3)^2 = 5
D. (x+2)^2 + (y+3)^2 = 5
13. Find the sum to infinity of the geometric series 1, 1/2, 1/4,…
A. 2 ✓
B. 3
C. 1/2
D. 1
14. A vector has components (3, 4). Its magnitude is:
A. 5 ✓
B. 7
C. 3
D. 4
15. Integrate cos(x) with respect to x
A. sin(x) + C ✓
B. -sin(x) + C
C. cos(x) + C
D. tan(x) + C
16. The arithmetic mean of a probability distribution is called the:
A. Variance
B. Mode
C. Expectation (expected value) ✓
D. Standard deviation
17. The product of a matrix and its inverse is:
A. Zero matrix
B. Identity matrix ✓
C. The original matrix squared
D. A null matrix
18. The nth term of an arithmetic sequence is given by:
A. a + (n-1)d ✓
B. a * r^(n-1)
C. n(a + l)/2
D. a/(1-r)
19. Find dy/dx if y = e^(2x)
A. 2e^(2x) ✓
B. e^(2x)
C. 2e^x
D. e^x
20. Solve: 2^(2x) = 16
A. x = 2 ✓
B. x = 3
C. x = 1
D. x = 4
21. The standard deviation is the square root of the:
A. Mean
B. Variance ✓
C. Range
D. Median
22. A particle moves with velocity v = 3t^2 – 2. Find acceleration at t = 2.
A. 12 ✓
B. 10
C. 14
D. 6
23. If A = [2 1; 3 4], what is the transpose of A?
A. [2 3; 1 4] ✓
B. [4 1; 3 2]
C. [2 4; 1 3]
D. [3 2; 4 1]
24. The general solution of sin(x) = 0 is:
A. x = n*pi ✓
B. x = 2n*pi
C. x = n*pi/2
D. x = (2n+1)*pi/2
25. Find the area under y = 2x from x = 0 to x = 3
A. 9 ✓
B. 6
C. 18
D. 12
26. The coefficient of x^2 in the expansion of (1 + x)^5 is:
A. 5
B. 10 ✓
C. 15
D. 20
27. The imaginary part of the complex number 4 + 7i is:
A. 4
B. 7 ✓
C. 11
D. -7
28. A matrix is singular when its determinant is:
A. Greater than 1
B. Negative
C. Equal to zero ✓
D. Equal to 1
29. Find the turning point of y = x^2 – 4x + 5
A. (2 ✓
B. 1)
C. (1
D. 2)
30. The dot product of vectors a = (1,2) and b = (3,4) is:
A. 11 ✓
B. 10
C. 7
D. 8
31. Differentiate y = ln(x) with respect to x
A. 1/x ✓
B. x
C. ln(x)/x
D. 1/x^2
32. The correlation coefficient r lies between:
A. 0 and 1
B. -1 and 1 ✓
C. 0 and 100
D. -100 and 100
33. If P(A) = 0.4 and P(B) = 0.5 and A and B are independent, find P(A and B).
A. 0.2 ✓
B. 0.9
C. 0.1
D. 0.45
34. Integrate (1/x) with respect to x
A. x^2/2 + C
B. ln|x| + C ✓
C. 1/x^2 + C
D. -1/x^2 + C
35. Find the common difference of the AP: 3, 7, 11, 15…
A. 4 ✓
B. 3
C. 5
D. 2
36. The focus of the parabola y^2 = 4x is at:
A. (0
B. 1) ✓
C. (1
D. 0)
37. The angle between vectors (1,0) and (0,1) is:
A. 30 degrees
B. 45 degrees
C. 60 degrees
D. 90 degrees ✓
38. If f(x) = x^3, then f”(x) (second derivative) is:
A. 3x^2
B. 6x ✓
C. x^2
D. 3x
39. The sum of the first 10 terms of an AP with a=2 and d=3 is:
A. 155 ✓
B. 165
C. 145
D. 175
40. A box contains 4 red and 6 blue balls. Two are drawn without replacement. Probability both are red?
A. 12/90
B. 6/45
C. 2/15 ✓
D. 4/10
41. The hyperbola x^2/9 – y^2/4 = 1 has centre at:
A. (3
B. 2) ✓
C. (0
D. 0)
42. Evaluate: lim (x to 0) of sin(x)/x
A. 0
B. 1 ✓
C. infinity
D. undefined
43. The conjugate of 3 – 5i is:
A. 3 + 5i ✓
B. -3 + 5i
C. 3 – 5i
D. -3 – 5i
44. Find the equation of the tangent to y = x^2 at x = 2
A. y = 4x – 4 ✓
B. y = 2x + 4
C. y = 4x + 4
D. y = 2x – 4
45. Newton’s first law of motion states that:
A. F = ma
B. A body remains at rest or in uniform motion unless acted on by an external force ✓
C. Every action has an equal and opposite reaction
D. Acceleration is proportional to displacement
46. Which of the following is the inverse of matrix [a b; c d]?
A. 1/(ad-bc) * [d -b; -c a] ✓
B. 1/(ad+bc) * [d b; c a]
C. [a b; c d]
D. [d c; b a]
47. The general term of a geometric progression with first term a and ratio r is:
A. a + (n-1)d
B. a * r^(n-1) ✓
C. n/2(2a + (n-1)d)
D. a/(1-r)
48. Differentiate y = x^3 * sin(x) using the product rule
A. 3x^2 * sin(x) + x^3 * cos(x) ✓
B. 3x^2 * cos(x)
C. x^3 * cos(x)
D. sin(x) + cos(x)
49. The probability of a certain event is:
A. 0
B. 0.5
C. 1 ✓
D. Between 0 and 1 exclusive
50. Integrate from 0 to 2 of (3x^2)dx
A. 8 ✓
B. 6
C. 12
D. 4
5 Theory Questions with Full Solutions
Question 1: (a) Find the sum of the first 15 terms of an arithmetic progression whose first term is 3 and common difference is 4. (b) Find the 10th term.
Answer:
(a) Use the formula S_n = n/2 * (2a + (n-1)d). S_15 = 15/2 * (2(3) + (15-1)(4)) = 15/2 * (6 + 56) = 15/2 * 62 = 15 * 31 = 465. The sum of the first 15 terms is 465. (b) Use T_n = a + (n-1)d. T_10 = 3 + (10-1)(4) = 3 + 36 = 39. The 10th term is 39.
Question 2: Differentiate the following: (a) y = 4x^3 – 7x + 2 (b) y = x^2 * cos(x) (c) y = (2x + 1)^5
Answer:
(a) Using the power rule: dy/dx = 12x^2 – 7. (b) Using the product rule where u = x^2 and v = cos(x): du/dx = 2x and dv/dx = -sin(x). dy/dx = u*dv/dx + v*du/dx = x^2 * (-sin(x)) + cos(x) * 2x = 2x*cos(x) – x^2*sin(x). (c) Using the chain rule: let u = 2x + 1. y = u^5. dy/du = 5u^4 and du/dx = 2. dy/dx = 5(2x+1)^4 * 2 = 10(2x + 1)^4.
Question 3: A particle starts from rest and moves along a straight line. Its displacement in metres after t seconds is given by s = 2t^3 – 9t^2 + 12t. Find: (a) the velocity at t = 2 (b) the acceleration at t = 3 (c) when the particle is momentarily at rest.
Answer:
(a) Velocity v = ds/dt = 6t^2 – 18t + 12. At t = 2: v = 6(4) – 18(2) + 12 = 24 – 36 + 12 = 0 m/s. The particle is momentarily at rest at t = 2. (b) Acceleration a = dv/dt = 12t – 18. At t = 3: a = 12(3) – 18 = 36 – 18 = 18 m/s^2. (c) Particle is at rest when v = 0. 6t^2 – 18t + 12 = 0. Divide by 6: t^2 – 3t + 2 = 0. Factorise: (t-1)(t-2) = 0. The particle is at rest at t = 1 second and t = 2 seconds.
Question 4: Given the matrix A = [3 1; 2 4]: (a) Find the determinant of A. (b) Find the inverse of A. (c) Use the inverse to solve the system: 3x + y = 10 and 2x + 4y = 16.
Answer:
(a) det(A) = (3)(4) – (1)(2) = 12 – 2 = 10. (b) A^(-1) = (1/det) * [d -b; -c a] = (1/10) * [4 -1; -2 3]. (c) Write as A * [x; y] = [10; 16]. So [x; y] = A^(-1) * [10; 16]. x = (1/10) * (4*10 + (-1)*16) = (1/10) * (40 – 16) = (1/10) * 24 = 2.4. y = (1/10) * ((-2)*10 + 3*16) = (1/10) * (-20 + 48) = (1/10) * 28 = 2.8. Therefore x = 2.4 and y = 2.8.
Question 5: A bag contains 5 red balls and 3 blue balls. Two balls are drawn one at a time without replacement. Find: (a) the probability both are red (b) the probability the first is red and the second is blue (c) the probability at least one is red.
Answer:
(a) P(both red) = P(first red) * P(second red given first was red) = (5/8) * (4/7) = 20/56 = 5/14. (b) P(first red, second blue) = (5/8) * (3/7) = 15/56. (c) P(at least one red) = 1 – P(none red) = 1 – P(both blue). P(both blue) = (3/8) * (2/7) = 6/56 = 3/28. P(at least one red) = 1 – 3/28 = 25/28.
FAQ: Further Mathematics NECO 2026/2027
Q: Is Further Mathematics compulsory for NECO?
A: No, it is optional. But students applying for Engineering, Mathematics, or Physics at university should include it in their NECO subject combination.
Q: Which topics carry the most marks in Further Mathematics?
A: Calculus, sequences and series, matrices, and probability consistently earn the most marks. Mechanics questions also appear regularly.
Q: How do I avoid losing marks in Further Mathematics?
A: Always show full working. Even if your final answer is wrong, correct steps earn marks. Never skip steps, and always state your formula before substituting values.
— SUBJECT 4 —
NECO 2026/2027 Biology: 50 Likely Exam Questions, Theory Answers & How to Score an A
Frequently Asked Questions About This Topic
What are the likely NECO 2026/2027 Biology questions?
How do I pass NECO Biology and score above 70?
What does the NECO Biology syllabus cover in 2026/2027?
Introduction
Biology is one of the most popular NECO subjects because it is required for students who want to study Medicine, Nursing, Pharmacy, Biochemistry, Agriculture, and many other science-based courses. It is a subject full of living things, processes, and systems, and students who approach it with curiosity tend to enjoy it and score well. NECO Biology questions test both your ability to recall facts and your ability to explain biological processes clearly. This article gives you 50 carefully selected objective questions and 5 theory questions with full answers based on the NECO syllabus and past question patterns. Read every explanation, not just the answer.
NECO Biology Syllabus Breakdown for 2026/2027
NECO Biology covers: Cell biology including cell structure and functions. Nutrition in plants and animals. Gaseous exchange and respiration. Transport systems in plants and animals. Excretion and homeostasis. Support and locomotion. Reproduction in plants and animals. Genetics and evolution. Ecology and environment. Micro-organisms and their roles. Health and disease including common diseases in Nigeria. Practical biology including use of instruments and specimens.
50 Objective Questions and Answers
1. The powerhouse of the cell is the:
A. Nucleus
B. Ribosome
C. Mitochondrion ✓
D. Golgi body
2. The process by which plants make their own food is called:
A. Respiration
B. Photosynthesis ✓
C. Transpiration
D. Digestion
3. Which organelle is responsible for protein synthesis?
A. Mitochondrion
B. Nucleus
C. Ribosome ✓
D. Lysosome
4. Osmosis is the movement of water molecules from a region of:
A. High solute concentration to low
B. Low water potential to high water potential
C. High water potential to low water potential through a semi-permeable membrane ✓
D. High solute to low solute without a membrane
5. The blood group that is called the universal donor is:
A. AB
B. B
C. O ✓
D. A
6. Photosynthesis takes place in which part of the plant cell?
A. Mitochondrion
B. Chloroplast ✓
C. Nucleus
D. Cell wall
7. Which of the following is NOT a function of the skeleton?
A. Support
B. Protection
C. Blood cell production
D. Digestion of food ✓
8. The process of breaking down glucose in the absence of oxygen is called:
A. Aerobic respiration
B. Photosynthesis
C. Anaerobic respiration ✓
D. Transpiration
9. The functional unit of the kidney is the:
A. Nephron ✓
B. Glomerulus
C. Ureter
D. Pelvis
10. Chromosomes are found in the:
A. Cytoplasm
B. Mitochondria
C. Nucleus ✓
D. Ribosome
11. Which of the following diseases is caused by a virus?
A. Malaria
B. Tuberculosis
C. HIV/AIDS ✓
D. Cholera
12. The part of the brain that controls balance and coordination is the:
A. Cerebrum
B. Medulla oblongata
C. Cerebellum ✓
D. Hypothalamus
13. Transpiration in plants occurs mainly through the:
A. Root hair cells
B. Stomata ✓
C. Xylem
D. Phloem
14. Which of the following is a characteristic of living things?
A. They all have roots
B. Irritability and response to stimuli ✓
C. They cannot move
D. They all have red blood cells
15. The male gamete in flowering plants is contained in the:
A. Ovule
B. Style
C. Pollen grain ✓
D. Stigma
16. Haemoglobin is found in:
A. White blood cells
B. Platelets
C. Red blood cells ✓
D. Plasma
17. Which of the following is a secondary sexual characteristic in human males?
A. Menstruation
B. Breast development
C. Growth of facial hair ✓
D. Widening of hips
18. The process by which organisms adapt to live in water and on land is an example of:
A. Mutation
B. Evolution and natural selection ✓
C. Osmosis
D. Fermentation
19. In a food chain, the organism that converts sunlight to chemical energy is called a:
A. Consumer
B. Decomposer
C. Producer ✓
D. Carnivore
20. DNA stands for:
A. Deoxyribonucleic acid ✓
B. Dinitrogenous acid
C. Deoxyribose nitrogen acid
D. Dinucleotide acid
21. Which type of reproduction produces offspring genetically identical to the parent?
A. Sexual reproduction
B. Cross-pollination
C. Asexual reproduction ✓
D. Fertilisation
22. The enzyme responsible for digesting starch in the mouth is:
A. Pepsin
B. Salivary amylase ✓
C. Lipase
D. Trypsin
23. The green colour of plants is due to the presence of:
A. Chlorophyll ✓
B. Carotene
C. Anthocyanin
D. Xanthophyll
24. Which of the following is an example of mutualism?
A. A tick feeding on a dog
B. Nitrogen-fixing bacteria in legume roots ✓
C. A tapeworm in the human intestine
D. Fungi decomposing dead leaves
25. The condition where a person’s blood does not clot normally is called:
A. Anaemia
B. Haemophilia ✓
C. Leukaemia
D. Sickle cell disease
26. In genetics, dominant alleles are represented by:
A. Lowercase letters
B. Capital letters ✓
C. Numerals
D. Greek symbols
27. Which organ produces bile in the human body?
A. Stomach
B. Pancreas
C. Liver ✓
D. Gallbladder
28. The movement of water through a plant from roots to leaves is driven mainly by:
A. Root pressure and transpiration pull ✓
B. Photosynthesis
C. Osmosis alone
D. Phloem transport
29. A community of organisms interacting with their non-living environment is called a/an:
A. Habitat
B. Population
C. Ecosystem ✓
D. Biome
30. The hormone responsible for regulating blood sugar levels is:
A. Adrenaline
B. Oestrogen
C. Insulin ✓
D. Thyroxine
31. Which of the following is the correct sequence of events in mitosis?
A. Prophase ✓
B. Metaphase
C. Anaphase
D. Telophase
32. The vector for malaria is:
A. Housefly
B. Tsetse fly
C. Female Anopheles mosquito ✓
D. Culex mosquito
33. Which blood component is responsible for clotting?
A. Red blood cells
B. White blood cells
C. Platelets ✓
D. Plasma
34. The condition in which both alleles are expressed in the offspring is called:
A. Complete dominance
B. Codominance ✓
C. Recessiveness
D. Epistasis
35. Xylem tissue in plants is responsible for transporting:
A. Manufactured food downward
B. Water and mineral salts upward from roots ✓
C. Carbon dioxide to leaves
D. Oxygen to roots
36. The role of decomposers in an ecosystem is to:
A. Convert light energy to chemical energy
B. Break down dead organic matter and release nutrients ✓
C. Produce oxygen
D. Feed on living organisms
37. Which of the following is an example of excretion in plants?
A. Shedding of leaves ✓
B. Absorption of water
C. Germination
D. Photosynthesis
38. In the human eye, the part that controls the amount of light entering is the:
A. Cornea
B. Lens
C. Iris ✓
D. Retina
39. Antibodies are produced by:
A. Red blood cells
B. Platelets
C. B-lymphocytes ✓
D. Neurons
40. The nitrogen cycle involves all of the following EXCEPT:
A. Nitrogen fixation
B. Nitrification
C. Denitrification
D. Photosynthesis ✓
41. Which organ in plants is most responsible for gaseous exchange?
A. Root
B. Stem
C. Leaf through stomata ✓
D. Flower
42. A zygote is formed by the fusion of:
A. Two sperm cells
B. An egg and a sperm ✓
C. Two egg cells
D. A sperm and a body cell
43. Kwashiorkor is caused by a deficiency of:
A. Vitamins
B. Carbohydrates
C. Proteins ✓
D. Minerals
44. The process by which bacteria convert atmospheric nitrogen into ammonia is called:
A. Denitrification
B. Nitrogen fixation ✓
C. Nitrification
D. Ammonification
45. Which of the following is NOT a sexually transmitted infection?
A. Gonorrhoea
B. Syphilis
C. Typhoid fever ✓
D. HIV/AIDS
46. The large intestine in humans is primarily responsible for:
A. Digesting proteins
B. Absorbing most nutrients
C. Absorbing water and forming faeces ✓
D. Producing bile
47. Turgor pressure in plant cells is caused by:
A. Loss of water from the cell
B. Photosynthesis
C. Entry of water into the cell by osmosis ✓
D. Glucose production
48. Which of the following is an endocrine gland?
A. Sweat gland
B. Salivary gland
C. Pituitary gland ✓
D. Tear gland
49. A genotype of Aa produces which phenotypic ratio when crossed with Aa?
A. 1:2:1
B. 3:1 ✓
C. 1:1
D. 2:1
50. Which of the following is a function of the placenta during pregnancy?
A. Producing breast milk
B. Connecting the foetus to the mother and exchanging nutrients and waste ✓
C. Forming the skull of the baby
D. Producing gametes
5 Theory Questions and Answers
Question 1: With the aid of a labelled diagram description, explain the structure and function of a typical animal cell.
Answer:
A typical animal cell contains the following structures: The nucleus is the control centre of the cell. It contains DNA and directs all cell activities including growth and reproduction. The nuclear membrane surrounds and protects the nucleus. The cytoplasm is a jelly-like fluid that fills the cell and holds organelles in place. Chemical reactions occur in the cytoplasm. The cell membrane is a thin, flexible outer boundary that controls what enters and leaves the cell. It is semi-permeable. Mitochondria are the sites of aerobic respiration where energy in the form of ATP is released for cell activities. They are therefore most numerous in active cells. Ribosomes are tiny structures responsible for protein synthesis. They read genetic instructions and build proteins. The Golgi body receives and packages proteins made by ribosomes and prepares them for export from the cell. Lysosomes contain digestive enzymes that break down old organelles and foreign particles. In your diagram, draw and label each organelle clearly.
Question 2: Explain the process of photosynthesis. State the raw materials, products, and conditions needed.
Answer:
Photosynthesis is the process by which green plants use sunlight, water, and carbon dioxide to produce glucose and oxygen. The chemical equation is: 6CO2 + 6H2O + light energy produces C6H12O6 + 6O2. Raw materials needed are carbon dioxide, which enters through the stomata, and water, which is absorbed by the roots and transported to the leaves through xylem. Conditions needed include sunlight to provide energy and chlorophyll, the green pigment in chloroplasts, which captures the light energy. Photosynthesis occurs in two stages. The light-dependent reaction takes place in the grana of the chloroplast. Light energy splits water molecules, releasing oxygen as a by-product and producing ATP and NADPH. The light-independent reaction (Calvin cycle) takes place in the stroma. ATP and NADPH are used to convert carbon dioxide into glucose. The glucose produced is used for energy, stored as starch, or used to build other organic molecules.
Question 3: Describe Mendel’s laws of inheritance and explain the result of a monohybrid cross between a tall plant (TT) and a short plant (tt).
Answer:
Gregor Mendel, a scientist and monk working in the 19th century, proposed two laws based on his experiments with pea plants. The Law of Segregation states that each organism carries two alleles for each trait, and these alleles separate during gamete formation so that each gamete carries only one allele. The Law of Independent Assortment states that alleles of different genes are inherited independently of each other. For the monohybrid cross between TT (tall) and tt (short): The F1 generation: All offspring are Tt, meaning all are tall. Tallness (T) is dominant over shortness (t). F1 phenotype is 100% tall. The F2 generation (crossing Tt x Tt): Using a Punnett square, the offspring are TT, Tt, Tt, and tt. Phenotypic ratio: 3 tall to 1 short (3:1). Genotypic ratio: 1 TT : 2 Tt : 1 tt (1:2:1). The 3:1 phenotypic ratio in F2 is one of the most commonly tested results in NECO Genetics. Always draw the Punnett square in your answer.
Question 4: Discuss FIVE effects of pollution on the environment and human health.
Answer:
First, air pollution from vehicle exhaust, industrial smoke, and bush burning releases harmful gases such as carbon monoxide, sulphur dioxide, and nitrogen oxides. These gases cause respiratory diseases including asthma, bronchitis, and lung cancer. They also contribute to acid rain, which damages crops and water sources. Second, water pollution from industrial waste, oil spills, and sewage contaminates rivers and underground water. Consuming polluted water causes diseases such as cholera, typhoid, and dysentery. Third, soil pollution from chemical fertilisers, pesticides, and waste materials reduces soil fertility and kills beneficial soil organisms. Crops grown on polluted soil absorb toxic substances that harm human health. Fourth, noise pollution from heavy machinery, generators, and traffic causes stress, hearing damage, sleep disorders, and reduced productivity among workers and residents near industrial areas. Fifth, plastic and solid waste pollution blocks drainages, creates breeding grounds for mosquitoes and rats, and contributes to flooding in urban areas like Lagos. It also enters water bodies and harms aquatic life.
Question 5: Explain the following terms and give one example of each: (a) Ecosystem (b) Food chain (c) Ecological succession (d) Symbiosis
Answer:
(a) Ecosystem: An ecosystem is a community of living organisms interacting with each other and with their non-living environment as a system. Example: A freshwater pond where fish, algae, bacteria, and insects interact with the water, sunlight, and minerals. (b) Food chain: A food chain is a sequence showing how energy and nutrients are transferred from one organism to the next through feeding. Example: Grass to grasshopper to frog to snake to eagle. Energy flows from producers to consumers in one direction. (c) Ecological succession: Ecological succession is the gradual change in the species structure of a community over time, leading to a stable climax community. Example: A bare rock first supports lichens, then mosses, then grasses, then shrubs, and finally trees over many years. (d) Symbiosis: Symbiosis is a close, long-term relationship between two different species. It includes mutualism, commensalism, and parasitism. Example of mutualism: Nitrogen-fixing Rhizobium bacteria in the root nodules of leguminous plants. Both organisms benefit.
FAQ: Biology NECO 2026/2027
Q: What are the most frequently tested Biology topics in NECO?
A: Cell biology, genetics, ecology, the circulatory system, reproduction, and nutrition appear in almost every NECO Biology paper. Spend the most time mastering these areas.
Q: Do I need to draw diagrams in NECO Biology theory answers?
A: Yes. Examiners award marks for clearly labelled diagrams. Practice drawing the cell, the heart, the kidney nephron, the flower, and the eye.
Q: How do I pass NECO Biology if I find it difficult?
A: Break the syllabus into small sections and study one section per day. Use diagrams and mnemonics to remember processes. Practice past questions regularly and read explanations, not just answers.
