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WAEC WASSCE 2024

WAEC Biology 2024 past questions

5 objective questions from the 2024 WAEC Biology paper. Answer each one, then reveal the answer and explanation.

All WAEC Biology past questions

  1. Question 1

    Classification

    Which of these animals belongs to the class Amphibia?

    1. Option A: toad
    2. Option B: hen
    3. Option C: chameleon
    4. Option D: tilapia
    Show the answer to question 1

    Answer: A, toad

    The toad is an amphibian (class Amphibia).

  2. Question 2

    Excretion and respiration

    The muscle that separates the thorax from the abdomen is the

    1. Option A: diaphragm
    2. Option B: intercostal muscle
    3. Option C: biceps
    4. Option D: sphincter
    Show the answer to question 2

    Answer: A, diaphragm

    The diaphragm is a sheet of muscle below the lungs.

  3. Question 3

    Reproduction

    Which hormone maintains pregnancy?

    1. Option A: Oestrogen
    2. Option B: Progesterone
    3. Option C: Testosterone
    4. Option D: Insulin
    Show the answer to question 3

    Answer: B, Progesterone

    Progesterone keeps the uterine lining in place.

  4. Question 4

    Genetics

    In pea plants, the allele for tall (T) is dominant over the allele for short (t). What is the genotypic ratio of the offspring of a cross between two Tt parents?

    1. Option A: 3 TT : 1 tt
    2. Option B: 1 TT : 1 tt
    3. Option C: 1 TT : 2 Tt : 1 tt
    4. Option D: 2 TT : 1 Tt : 1 tt
    Show the answer to question 4

    Answer: C, 1 TT : 2 Tt : 1 tt

    Tt × Tt gives TT, Tt, Tt, and tt: a 1 : 2 : 1 genotypic ratio.

  5. Question 5

    Nutrition

    The raw materials for photosynthesis are

    1. Option A: oxygen and glucose
    2. Option B: starch and water
    3. Option C: nitrogen and oxygen
    4. Option D: carbon(IV) oxide and water
    Show the answer to question 5

    Answer: D, carbon(IV) oxide and water

    Plants make glucose from carbon(IV) oxide and water.

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