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Refer the figures A, B and C and choose the correct option which shows animals that regulate buoyancy with the help of air bladder. 
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A. A and B

B. A and C

C. B and C

D. All of the above.

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

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  1. The given figures A, B, C and D are the examples of first true land vertebrates. They are dominant in…
  2. Refer the figures A, B, C and D given below. Which of the following options shows the correct name of…
  3. The given figure shows some characteristic features marked as chordates. Identify the correct labelling…
  4. In phylum arthropoda, excretion takes place through
  5. Select the incorrect feature of mollusca from the given statements. Terrestrial or aquatic animals having…
  6. Which of the following possesses electric organs and belongs to class chondrichthyes?
  7. Which of the following is not a characteristic of phylum echinodermata ?
  8. Which of the following statement is incorrect?
  9. Aquatic annelids (like Nereis) possess lateral appendages called ______________, which help in swimming.
  10. The transition from aquatic to terrestrial lifestyles required many adaptations in the vertebrate lineage.…
  11. Which of the following traits is not shared by both sea anemones and jellyfish ?
  12. Which of the following statements is without exception in sponges ?
  13. A file like rasping organ for feeding, called radula, present in the phylum __________.
  14. Tracheae of cockroach and mammal are similar in having
  15. Which of the following characteristics is correct for reptilia?
  16. Match the organisms given in column-I with their common name given in column-II and choose the correct…
  17. Which of the following statement(s) is/are correct regarding phylum coelenterata?(i) They are aquatic,…
  18. Identify the figures A, B and C and choose the correct option. 
  19. Which of the following animal contains respiratory organs like, gills, book gills, book lungs or tracheal…
  20. Column I contains zoological names of animals and column II contains their common name. Match the following…
  21. Which of the following feature is not correct regarding the figure given below? 
  22. Which of the following statements is incorrect ?
  23. Polyp phase is absent in
  24. Which of the following possesses poison sting and belongs to class chondrichthyes?
  25. A common characteristic of all vertebrates without exception is
  26. Identify the correct characteristic feature shown by the given figure? 
  27. Animals like annelids, arthropods, etc. where the body can be divided into identical left and right…
  28. In amphibians, heart is ________ chambered.
  29. Match the characteristic feature/terms given in column I with the phylum to which they belongs given…
  30. Hemichordates have now been placed with the nonchordates, close to echinoderms, because true