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NECO 2025

2025 NECO Biology Past Questions

Browse the 2025 NECO Biology past questions with answers and step-by-step explanations. Biology demands precise terminology and careful diagram reading. Successful candidates revise plant and animal physiology, ecology and genetics with active recall — and rehearse the standard practical setups before exam day. Use the year archive below to time yourself the way the actual exam does — most candidates need to work questions across multiple years before the patterns become obvious.

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Sample NECO Biology questions

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  1. Q12006MEDIUMMathematics

    What is the total surface area of a cylinder with radius 2cm and height 1.5cm, correct to 2 significant figures?

    1. A.440cm$^2$
    2. B.220cm$^2$✓ Correct
    3. C.88cm$^2$
    4. D.44cm$^2$
    5. E.22cm$^2$
  2. Q22003MEDIUMPhysics

    A body that produces its own light is said to be

    1. A.luminous
    2. B.non-incandescent
    3. C.opaque✓ Correct
    4. D.translucent
    5. E.transparent
  3. Q32007MEDIUMBiology

    The pro-condition for transfusion of blood to an accident victim is

    1. A.assess the level of blood lost
    2. B.boil the blood before transfusion
    3. C.cross-match the victims and donor blood groups✓ Correct
    4. D.mix the blood to be donated with sulphur
    5. E.remove the remaining blood from the accident victim before transfusing the blood
  4. Q42007MEDIUMBiology

    Which of the following is NOT a function of the mammalian skin?

    1. A.detoxication✓ Correct
    2. B.excretion
    3. C.production of vitamin D
    4. D.protection
    5. E.temperature control
  5. Q52006MEDIUMBiology

    What will the phenotypic ratio when a tall pea plant (TT) is crossed with a short pea plant (Tt)?

    1. A.0:04
    2. B.1:03✓ Correct
    3. C.2:02
    4. D.3:01
    5. E.4:00
  6. Q62002MEDIUMChemistry

    what dose the following equation illustrate? $ ^{238}U_{92} → ^{234}Th_{90} + ^4 He_2 $

    1. A.Artificial radioactivity
    2. B.nuclear fission
    3. C.nuclear fusion✓ Correct
    4. D.radio-decomposition
    5. E.spontaneous disintegration
  7. Q72003MEDIUMBiology

    i 2/2, c 1/1, pm 2/2, m 3/3 The above dental formula represents the dentition of

    1. A.cow
    2. B.dog
    3. C.man✓ Correct
    4. D.rabbit
    5. E.sheep
  8. Q82006MEDIUMBiology

    A population can be referred to as the number of

    1. A.adult organisms in an ecosystem✓ Correct
    2. B.female species in an ecosystem
    3. C.male species in an ecosystem
    4. D.organisms of same species in an ecosystem
    5. E.organisms that can withstand harsh conditions
  9. Q92005MEDIUMPhysics

    A 12V battery supplies a current of 0.4A to a lamp. Calculate the resistance of the lamp.

    1. A.30.00
    2. B.4.80✓ Correct
    3. C.3.00
    4. D.0.30
    5. E.0.03
  10. Q102006MEDIUMMathematics

    A bag contains 4 blue and 8 red identical balls. If two balls are picked at random with replacement, what is the probability of picking two balls of different colours?

    1. A.1
    2. B.$\frac{13}{26}$✓ Correct
    3. C.$\frac{5}{18}$
    4. D.$\frac{4}{9}$
    5. E.$\frac{2}{9}$
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