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WAEC WASSCE 2022

WAEC Biology 2022 past questions

5 objective questions from the 2022 WAEC Biology paper. Answer each one, then reveal the answer and explanation.

All WAEC Biology past questions

  1. Question 1

    Genetics

    In garden peas, the allele for yellow seeds (Y) is dominant over the allele for green seeds (y). What is the expected phenotypic ratio of the offspring of a cross between YY and yy parents?

    1. Option A: 3 yellow seeds : 1 green seeds
    2. Option B: All yellow seeds
    3. Option C: 1 yellow seeds : 1 green seeds
    4. Option D: All green seeds
    Show the answer to question 1

    Answer: B, All yellow seeds

    YY × yy gives only Yy offspring, all showing yellow seeds.

  2. Question 2

    Classification

    Which of these animals belongs to the class Aves?

    1. Option A: crocodile
    2. Option B: salamander
    3. Option C: hen
    4. Option D: seahorse
    Show the answer to question 2

    Answer: C, hen

    The hen is a bird (class Aves).

  3. Question 3

    Excretion and respiration

    The excretory organs of insects are

    1. Option A: flame cells
    2. Option B: Malpighian tubules
    3. Option C: nephridia
    4. Option D: contractile vacuoles
    Show the answer to question 3

    Answer: B, Malpighian tubules

    Insects excrete through Malpighian tubules.

  4. Question 4

    Nutrition

    A lack of vitamin D in children causes

    1. Option A: rickets
    2. Option B: scurvy
    3. Option C: pellagra
    4. Option D: goitre
    Show the answer to question 4

    Answer: A, rickets

    Vitamin D deficiency causes rickets.

  5. Question 5

    Reproduction

    The male part of a flower is the

    1. Option A: stamen
    2. Option B: pistil
    3. Option C: sepal
    4. Option D: petal
    Show the answer to question 5

    Answer: A, stamen

    The stamen is the anther and filament.

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