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A natural system of classification is based upon

A. natural relationships, reflecting evolutionary relationship

B. morphological similarities between organisms

C. embryologicall, biochemical, phisio-loical and ecological considerations

D. both (b) and (c)

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  1. In title classification of animals a 'family' name is formed by adding
  2. A natural system of classification is based upon
  3. Tube in the tube' plan is exhibited by one of the following phyla :
  4. Duck bill platypus is
  5. Salamander belongs to class
  6. The taxonomic unit of any rank/category is known as
  7. Chief distinguishing features of mammals are
  8. Which of the following groups of characters is present in all chordates in some or other stage in their…
  9. Flying bats are included under which order of class Mammalia ?
  10. The animals which are found in the soil, can fly, found on land and in water belong to the phylum
  11. Which one of the following is found in chordates but not in non-chordates
  12. Which of the group has no member having gliding or flying appendages ?
  13. Octopus belongs to class
  14. Snakes are not found in
  15. Character common in spider, cockroach and centipede is
  16. Exclusively marine animals are found in group
  17. True coelom appeared first in the course of evolution in
  18. These species inhabiting different geographical areas are
  19. The term 'Protista' was given by
  20. Which is matching set in taxonomy ?
  21. Coelentrates generally include the animals which are
  22. Which one of the following sets of animals belongs to class cydostomata
  23. The insects of the class Diptera include
  24. One of the following is not a true fish :
  25. Sepia is also known as
  26. Taenia, Periplaneta and Pheretima are non-chordates because
  27. Pheretivia is placed in class
  28. A reptile with a four-chambered heart is
  29. Which of the following is homiother-mous ?
  30. Apart from mammals, the other group of animals maintaining high and constant body temperature is