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Chetae are totally absent in

A. Nereis

B. Hirudinaria

C. Heteroneresis

D. Pheretima

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  1. Annelids show advancement over the nematoda in having
  2. The septal and pharyngeal nephridia open into the alimentary canal and are of enteronephric type. It…
  3. The terminal nephridial ducts of the septal nephridia of Pheretima open into
  4. Anticoagulant secreted by leech is
  5. The fertilization in earthworms occurs in
  6. Earthworm is useful because it
  7. The direction of blood flow in the dorsal vessel of earthworm is
  8. In earthworm fertilisation occurs in
  9. In earthworm, the nephridia without neprostomes are
  10. In earthworm, the genital papillae are situated ventrally on segments
  11. In Pheretima, the blood glands are located
  12. In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments.…
  13. In earthworm, the circular muscles are highly developed in
  14. Blood glands in Earthworm are associated with
  15. 5. The pre-typhlosolar region in Pheretima extends from
  16. Haemoglobin is dissolved in plasma is
  17. Locomotion in Earthworm is directly facilitated by
  18. Which region in earthworm is the forest of nephridia ?
  19. Chloragogen cells of Pheretima play a role very much like that of
  20. Spermathecae in earthworm represent
  21. Role of typhlosole in the intestine of earthworm is
  22. The gizzard of earthworm is an organ of
  23. Copulation occurs between two earthworms
  24. The nitrogenous waste in earthworm consist of about
  25. The coelomic fluid in earthworm escapes through
  26. The excretory organs of earthworm are
  27. Metamerism is present in
  28. Earthworms do not have any respiratory organs because
  29. Pheretima is
  30. Nephrostomes are found in