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Which of the following statement is incorrect?

A. Platyhelminthes has incomplete digestive system.

B. In coelenterates, the arrangement of cells is more complex.

C. Nereis is monoecious but earthworms and leeches are dioecious.

D. Simple and compound eyes are present in the animals of those phylum whose over two-thirds of all named species on earth are arthropods.

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  2. In amphibians, heart is ________ chambered.
  3. A student brought home a strange animal which he found outside under a rock. It had moist skin, a complete…
  4. Identify the figure with its correct name and phylum. 
  5. The following statement are associated with the occurrence of notochord. Identify the incorrect statement.
  6. Which one of the following categories of animals is correctly described with no single exception in…
  7. Which of the follwoing statement(s) is/are correct?(i) Organ systems in different group of animals show…
  8. Refer the types of cells present in some animals. Each cell is specialized to perform a single specific…
  9. Match the characteristic feature/terms given in column I with the phylum to which they belongs given…
  10. Which of the following animal contains respiratory organs like, gills, book gills, book lungs or tracheal…
  11. Which of the following is a correct match of a phylum with their three examples?
  12. Flame cells present in platyhelminthes, are specialized in
  13. Which of the following group of animals belongs to the same phylum?
  14. Match the organisms given in column-I with their common name given in column-II and choose the correct…
  15. Refer the following statement and answer the question. 'Name of X is derived from stinging capsules.…
  16. Which of the following animal's body is covered by calcareous shell and unsegmented with a distinct…
  17. Which of the following is not a characteristic of phylum echinodermata ?
  18. Animals like annelids, arthropods, etc. where the body can be divided into identical left and right…
  19. Which of the following class is being correctly described by given statements (i - iv)?(i) All living…
  20. In amphibians, respiration occurs through
  21. Tracheae of cockroach and mammal are similar in having
  22. The figure given below is the characteristic structure of the phylum in which animals are aquatic, free…
  23. Which of the following group of animals reproduces only by sexual means?
  24. The combination of a true coelom and repeating body segmentation allows the annelids (unlike the anatomically…
  25. The given figures of animals (A & B) are distinguished on the basis of symmetry. Select the correct…
  26. Which of the following statement(s) is/are correct regarding phylum coelenterata?(i) They are aquatic,…
  27. Identify the correct characteristics of porifera. Commonly known as sea walnuts.Presence of ostia and…
  28. Which of the following is not the common fundamental feature for animal classification?
  29. Refer the given figures A, B, C and D and identify the option which shows their correct name. 
  30. Heart is three - chambered in reptiles, except