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WAEC Biology questions: Excretion

22 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 1· Excretion· WAEC

    Filtration of blood under pressure in the kidney takes place in the

    Explanation and discussion

  2. Question 2· Excretion· WAEC

    Malpighian tubules are the excretory organs of

    Explanation and discussion

  3. Question 3· Excretion· WAEC

    The skin acts as an excretory organ by removing

    Explanation and discussion

  4. Question 4· Excretion· WAEC

    The main nitrogenous waste excreted by human beings is

    Explanation and discussion

  5. Question 5· Excretion· WAEC

    Deamination, which produces urea, is carried out in the

    Explanation and discussion

  6. Question 6· Excretion· WAEC

    Plants lose excess water mainly through their

    Explanation and discussion

  7. Question 7· Excretion· WAEC

    Plants get rid of excess water mainly through

    Explanation and discussion

  8. Question 8· Excretion· WAEC

    The excretory organs of a flatworm are

    Explanation and discussion

  9. Question 9· Excretion· WAEC

    The functional unit of the mammalian kidney is the

    Explanation and discussion

  10. Question 10· Excretion· WAEC

    Plants excrete some waste products by

    Explanation and discussion

  11. Question 11· Excretion· WAEC

    The organ in which excess amino acids are deaminated to form urea is the

    Explanation and discussion

  12. Question 12· Excretion· WAEC

    Glucose is normally absent from urine because it is

    Explanation and discussion

  14. Question 14· Excretion· WAEC

    Deamination of excess amino acids takes place in the

    Explanation and discussion

  15. Question 15· Excretion· WAEC

    The kidney filters about 180 litres of blood plasma a day, but only about 1.5 litres of urine is produced because

    Explanation and discussion

  16. Question 16· Excretion· WAEC

    Plants lose most of their excess water through the

    Explanation and discussion

  17. Question 17· Excretion· WAEC

    Which organ excretes carbon(IV) oxide in man?

    Explanation and discussion

  18. Question 18· Excretion· WAEC

    Which of these substances is normally absent from the urine of a healthy person?

    Explanation and discussion

  19. Question 19· Excretion· WAEC

    The main nitrogenous waste of mammals is

    Explanation and discussion

  20. Question 20· Excretion· WAEC

    The hormone ADH helps the kidney to

    Explanation and discussion

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