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Which of the following feature in birds indicates their reptilian ancestory ?

A. Eggs with a calcareous shell

B. Scales on their hind limbs

C. Four-chambered heart

D. Two special chambers-crop and gizzard in their digestive tract

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  1. Which of the following feature in birds indicates their reptilian ancestory ?
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  3. Refer the figures A, B, C and D given below. Which of the following options shows the correct name of…
  4. Which of the following is a poisonous snake?
  5. Which of the following is not a characteristic feature of kingdom animalia ?
  6. Which of the following class is being described by the given statements (i - iv)?(i) They are found…
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  8. Which of the following animal contains respiratory organs like, gills, book gills, book lungs or tracheal…
  9. Refer the types of cells present in some animals. Each cell is specialized to perform a single specific…
  10. In ctenophora, the body bears _______ external rows of ciliated comb plates, which help in locomotion.
  11. Column-I contains organisms and column-II contains their exeretory structures. Choose the correct match…
  12. Which of the following group of animals belongs to the same phylum?
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  16. Which of the following statements is incorrect ?
  17. Read the following statements and answer the question.(i) They are exclusively marine, radially symmetrical,…
  18. Which of the following statements (i v) are incorrect?(i) Parapodia are lateral appendages in arthropods…
  19. Which of the following is a correct match of a phylum with their three examples?
  20. The figure given below is the characteristic structure of the phylum in which animals are aquatic, free…
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  22. Identify the figure with its correct name and phylum. 
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  26. Which of the following pairs of animals are similar to each other pertaining to the feature stated against…
  27. Which one of the following categories of animals is correctly described with no single exception in…
  28. Which of the following statement(s) is/are correct for class amphibia?(i) Body is divisible into head…
  29. Which of the following is an incorrect statement regarding flatworms ?
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