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Which of the following statements is without exception in sponges ?

A. They all have calcareous spicules.

B. They have high regenerative power.

C. They are found only in marine water.

D. They are all radially symmetrical.

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

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  1. Read the following statements and answer the question.(i) They are exclusively marine, radially symmetrical,…
  2. Which of the following characteristic distinguish arthropoda from annelids and molluscs ?
  3. Which of the following possesses poison sting and belongs to class chondrichthyes?
  4. Refer the following animals and identify those which have a fluid filled body cavity with a complete…
  5. In phylum echinodermata, the adult echinoderms are ______A__________ but larvae are _______B______ .
  6. Which of the following is a correct match of a phylum with their three examples?
  7. Meandrina (brain coral) belongs to phylum
  8. The given figures of animals (A & B) are distinguished on the basis of symmetry. Select the correct…
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  10. The following statement are associated with the occurrence of notochord. Identify the incorrect statement.
  11. A student was given a specimen to identify on the basis of the characteristics given below.(i) They…
  12. Which of the following is a living fossil?
  13. Which of the following is not a characteristic of phylum echinodermata ?
  14. Identify the correct characteristics of porifera. Commonly known as sea walnuts.Presence of ostia and…
  15. Which of the follwoing statement(s) is/are correct?(i) Organ systems in different group of animals show…
  16. The given figure shows some characteristic features marked as chordates. Identify the correct labelling…
  17. The given figures A, B, C and D are the examples of first true land vertebrates. They are dominant in…
  18. Which of the following phylum is being described by the given statements?(i) These are primitive multicellular…
  19. In phylum arthropoda, excretion takes place through
  20. Which of the following is a chordate feature and not shared by the non-chordates ?
  21. Which one of the following groups of animals is correctly matched with its characteristic feature without…
  22. Which of the following statements is without exception in sponges ?
  23. Which of the following animal contains respiratory organs like, gills, book gills, book lungs or tracheal…
  24. Match the phylum given in column - I with the special features present in them given in column - II…
  25. Which of the following phylum is being described by the given statements?(i) They are bilaterally symmetrical,triploblastic,…
  26. Identify the animals shown in the given figures A, B and C from options given below. 
  27. Heart is three - chambered in reptiles, except
  28. Match the terms/feature given in column I with their examples given in column II and select the correct…
  29. Which of the following statements is incorrect ?
  30. Which of the following statement is incorrect?