In earthworm, the genital papillae are situated ventrally on segments

A. 17

B. 18

C. 19 and 22

D. 17 and 19

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  1. 5. The pre-typhlosolar region in Pheretima extends from
  2. Pheretima is
  3. The nitrogenous waste in earthworm consist of about
  4. Copulation occurs between two earthworms
  5. In earthworm, the circular muscles are highly developed in
  6. Haemoglobin is dissolved in plasma is
  7. In earthworm, the septal nephridia put their excretory discharge into
  8. Annelids show advancement over the nematoda in having
  9. Anticoagulant secreted by leech is
  10. A skeleton like function during locomotion of Pheretima is performed by
  11. Chloragogen cells of Pheretima play a role very much like that of
  12. In Pheretima, the blood glands are located
  13. The coelomic fluid in earthworm escapes through
  14. A chitinous lining in earthworm is found in
  15. Nereis is commonly called
  16. Blood glands in Earthworm are associated with
  17. The terminal nephridial ducts of the septal nephridia of Pheretima open into
  18. The enteronephric nephridia in earthworm are
  19. In earthworm fertilisation occurs in
  20. The cliteilum singulum in earthworm is formed by
  21. The chloragogen cells of earthworm are analogous to
  22. The fertilization in earthworms occurs in
  23. In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments.…
  24. In earthworm, the first segment in which mouth is situated is known as
  25. Sperma thecae in earthworm are meant few
  26. Chromophil cells in earthworm are concerned with the secretion of
  27. The female genital aperture in earthworm is present ventrally on segment
  28. Metamerism is present in
  29. The excretory organs of earthworm are
  30. The number of segments in leech is