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Which of the following is not a characteristic of phylum echinodermata ?

A. They have a water vascular system.

B. They have an internal skeleton.

C. They are protostomes.

D. They have bilateral symmetry at larval stage.

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Meandrina (brain coral) belongs to phylum
  2. Identify the figures and select the correct option 
  3. Match the phylum given in column - I with the special features present in them given in column - II…
  4. Which one of the following groups of animals is correctly matched with its characteristic feature without…
  5. Which of the following animals are bilaterally symmetrical?
  6. Which of the following is not the common fundamental feature for animal classification?
  7. Which of the following statements (i v) are incorrect?(i) Parapodia are lateral appendages in arthropods…
  8. Which of the following statement(s) is/are correct regarding phylum coelenterata?(i) They are aquatic,…
  9. The given figures of animals (A & B) are distinguished on the basis of symmetry. Select the correct…
  10. In amphibians, respiration occurs through
  11. Which one of the following categories of animals is correctly described with no single exception in…
  12. Which of the following animal contains respiratory organs like, gills, book gills, book lungs or tracheal…
  13. In ctenophora, the body bears _______ external rows of ciliated comb plates, which help in locomotion.
  14. Identify the figure with its correct name and phylum. 
  15. Match the terms/feature given in column I with their examples given in column II and select the correct…
  16. Aquatic annelids (like Nereis) possess lateral appendages called ______________, which help in swimming.
  17. Which of the following is a living fossil?
  18. Which of the following statement(s) is/are correct?(i) Animals in which the cells are arranged in two…
  19. The transition from aquatic to terrestrial lifestyles required many adaptations in the vertebrate lineage.…
  20. Which of the following statement(s) is/are correct regarding phylum mollusca?
  21. Which of the following possesses electric organs and belongs to class chondrichthyes?
  22. Match the characteristic feature/terms given in column I with the phylum to which they belongs given…
  23. Which of the following pairs of animals are similar to each other pertaining to the feature stated against…
  24. Which of the following is a connecting link between invertebrates and non-invertebrates?
  25. The following statement are associated with the occurrence of notochord. Identify the incorrect statement.
  26. Which of the following class is being correctly described by given statements (i - iv)?(i) All living…
  27. Which of the following phylum is being described by the given statements?(i) They are bilaterally symmetrical,triploblastic,…
  28. Match the organisms given in column-I with their common name given in column-II and choose the correct…
  29. In which of the phylum, excretory organ like proboscis gland is present?
  30. Which of the following is not a characteristic of phylum echinodermata ?