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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. Structure typically represented in every segment of earthworm is
  2. The chloragogen cells of earthworm are analogous to
  3. The female genital aperture in earthworm is present ventrally on segment
  4. Chromophil cells in earthworm are concerned with the secretion of
  5. Sperma thecae in earthworm are meant few
  6. The enteronephric nephridia in earthworm are
  7. Metamerism is present in
  8. Blood glands in Earthworm are associated with
  9. Chetae are totally absent in
  10. The septal and pharyngeal nephridia open into the alimentary canal and are of enteronephric type. It…
  11. Earthworms do not have any respiratory organs because
  12. The excretory organs of earthworm are
  13. In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments.…
  14. The gizzard of earthworm is an organ of
  15. Which region in earthworm is the forest of nephridia ?
  16. In earthworm, the first segment in which mouth is situated is known as
  17. Pheretima is
  18. The direction of blood flow in the dorsal vessel of earthworm is
  19. A chitinous lining in earthworm is found in
  20. The fertilization in earthworms occurs in
  21. Role of typhlosole in the intestine of earthworm is
  22. Anticoagulant secreted by leech is
  23. The number of segments in leech is
  24. The cliteilum singulum in earthworm is formed by
  25. In earthworm, the nephridia without neprostomes are
  26. In earthworm, the genital papillae are situated ventrally on segments
  27. In earthworm, the circular muscles are highly developed in
  28. The coelomic fluid in earthworm escapes through
  29. The coelom in Pherethna is
  30. Spermathecae in earthworm represent