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WAEC Biology questions

353 questions with answers and explanations. Tap an option to check yourself.

AllJAMBWAEC
All topicsCell structure and organisation · 26Cellular activities · 24Co-ordination and control · 27Ecology · 33Evolution · 18Excretion · 22Growth · 18Heredity and variation · 24Nutrition · 30Reproduction · 29Respiration · 25Support and movement · 22Transport · 27Variety of organisms · 28

  1. Question 181· Heredity and variation· WAEC

    If a man of blood group AB marries a woman of group O, their children can have blood group

    Explanation and discussion

  2. Question 182· Heredity and variation· WAEC

    A child has sickle-cell anaemia (SS) when he receives

    Explanation and discussion

  4. Question 184· Heredity and variation· WAEC

    Which of these is an example of discontinuous variation?

    Explanation and discussion

  5. Question 185· Heredity and variation· WAEC

    A characteristic that shows in the offspring whenever its gene is present is

    Explanation and discussion

  6. Question 186· Heredity and variation· WAEC

    Crossing two heterozygous tall plants (Tt × Tt) gives a phenotypic ratio of

    Explanation and discussion

  7. Question 187· Heredity and variation· WAEC

    The ABO blood groups are an example of

    Explanation and discussion

  8. Question 188· Heredity and variation· WAEC

    A cross between two heterozygous tall pea plants (Tt × Tt) produces offspring in the ratio

    Explanation and discussion

  9. Question 189· Heredity and variation· WAEC

    A person with sickle cell trait has the genotype

    Explanation and discussion

  10. Question 190· Heredity and variation· WAEC

    The scientist known as the father of genetics is

    Explanation and discussion

  11. Question 191· Heredity and variation· WAEC

    Two heterozygous tall pea plants (Tt × Tt) are crossed. What is the phenotypic ratio of the offspring?

    Explanation and discussion

  12. Question 192· Heredity and variation· WAEC

    Haemophilia is more common in males because it is

    Explanation and discussion

  13. Question 193· Nutrition· WAEC

    In testing a leaf for starch, the leaf is boiled in alcohol to

    Explanation and discussion

  14. Question 194· Nutrition· WAEC

    An organism that makes its own food from simple substances is

    Explanation and discussion

  15. Question 195· Nutrition· WAEC

    The food substance that provides most energy for the body is

    Explanation and discussion

  16. Question 196· Nutrition· WAEC

    Which of these is an insectivorous plant?

    Explanation and discussion

  17. Question 197· Nutrition· WAEC

    Starch in a food sample is detected with

    Explanation and discussion

  18. Question 198· Nutrition· WAEC

    Which of the following is a saprophyte?

    Explanation and discussion

  19. Question 199· Nutrition· WAEC

    Teeth used for cutting food are the

    Explanation and discussion

  20. Question 200· Nutrition· WAEC

    Rickets is caused by a deficiency of

    Explanation and discussion

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