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A very well developed brain is present in

A. Starfish

B. Jellyfish

C. Cuttlefish

D. Fresh water mussel

Correct Answer : C.


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  1. Sea cucumber belongs to class
  2. The Echinoderms are marine animals with
  3. In which of the Echinoderm, the arms, spines and pedicellaria are absent ?
  4. Which is not true of Echinoderms?
  5. Main difference between starfishes and brittle stars is in the
  6. Which one of these is an Echinoderm ?
  7. Pedicellariae are modified
  8. Water vascular system helps in
  9. The larva that occurs in the development of Sea urchin is
  10. Which one of the following Echinoder-mate is found in fresh water ?
  11. Ambulacral system or water vascular system is typically found in
  12. Animals which exhibit radial, pen-tamerous symmetry in adults, and bilateral symmetry amongst larvae,…
  13. Pentamerous echinoderms with five slender flexible arms sharply marked off from the central disc are
  14. Class Holothuroidea of phylum Echinodermat a includes
  15. In star fish the locomotary organs are
  16. The star fish's pyloric caeca are organs of
  17. The respiratory organs in a sea star are
  18. Bipinnaria larva is found in the development of a
  19. The common name of Antedon is
  20. Which of the following is a living fossil ?
  21. The animal that moves with tube feet is
  22. Spines of the body of Sea urchin are
  23. Madriporite or seive plate is found in
  24. A very well developed brain is present in
  25. The larva of holothuroide is
  26. Auricuiaria is the larva of
  27. Madreporite is associated with
  28. The generic name of 'feather star' is
  29. The star fish zygote develops into a
  30. Brittle star belongs to the class