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Structural Organisation in Animals

Morphology of Earthworm Practice Questions

20 free Morphology of Earthworm practice questions for the NCERT Biology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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All Morphology of Earthworm questions

20 questions
  1. Q1. The common Indian earthworms are Pheretima and:
  2. Q2. In earthworms, the dorsal surface of the body is marked by a dark median mid-dorsal line which represents the:
  3. Q3. The first segment of the earthworm, which contains the mouth, is called the:
  4. Q4. What is the primary function of the prostomium in an earthworm?
  5. Q5. In a mature earthworm, segments 14, 15, and 16 are covered by a prominent dark band of glandular tissue called the:
  6. Q6. Four pairs of spermathecal apertures are situated on the ventro-lateral sides of the intersegmental grooves in which segments?
  7. Q7. A single female genital pore is present in the mid-ventral line of segment:
  8. Q8. S-shaped setae, embedded in the epidermal pits, are absent in which segments of the earthworm?
  9. Q9. The body wall of the earthworm is covered externally by a very thin non-cellular layer called:
  10. Q10. The alimentary canal of the earthworm is a straight tube. In which segments is the gizzard located?
  11. Q11. Calciferous glands, which neutralize the humic acid present in humus, are found in the:
  12. Q12. Which internal feature of the earthworm intestine increases the effective area of absorption?
  13. Q13. Earthworms possess a closed circulatory system. Blood glands, which produce blood cells and hemoglobin, are present in which segments?
  14. Q14. Excretion and osmoregulation in earthworms are performed by tube-like coiled structures called:
  15. Q15. Which type of nephridia open into the intestine (enteronephric)?
  16. Q16. The nervous system of the earthworm is represented by ganglia arranged segmentally on the:
  17. Q17. Earthworms are hermaphrodites, but self-fertilization does not occur. Why?
  18. Q18. Two pairs of testes are present in segments:
  19. Q19. Fertilization and embryo development in earthworms occur inside:
  20. Q20. The development of earthworms is described as: