In earthworm, the circular muscles are highly developed in

A. body wall

B. gizzard

C. typholsole

D. pharynx

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  1. In earthworm, the septal nephridia put their excretory discharge into
  2. In earthworm, the nephridia without neprostomes are
  3. Copulation occurs between two earthworms
  4. Metamerism is present in
  5. Annelids show advancement over the nematoda in having
  6. Locomotion in Earthworm is directly facilitated by
  7. The fertilization in earthworms occurs in
  8. The enteronephric nephridia in earthworm are
  9. Structure typically represented in every segment of earthworm is
  10. Nereis is commonly called
  11. In Pheretima, the blood glands are located
  12. The direction of blood flow in the dorsal vessel of earthworm is
  13. Spermathecae in earthworm represent
  14. In earthworm, the first segment in which mouth is situated is known as
  15. Haemoglobin is dissolved in plasma is
  16. Blood glands in Earthworm are associated with
  17. Chetae are totally absent in
  18. In earthworm, the circular muscles are highly developed in
  19. In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments.…
  20. The excretory organs of earthworm are
  21. Chromophil cells in earthworm are concerned with the secretion of
  22. The female genital aperture in earthworm is present ventrally on segment
  23. Earthworm has no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic…
  24. Pheretima is
  25. The number of segments in leech is
  26. Earthworms do not have any respiratory organs because
  27. Which of the following statements is correct ?
  28. Chloragogen cells of Pheretima play a role very much like that of
  29. The coelomic fluid in earthworm escapes through
  30. The gizzard of earthworm is an organ of