Higher plants take up nitrogen as

A. Nitrites only

B. Nitrates only

C. Nitrates and Ammonia

D. Urea

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  14. Blood is a kind of
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  19. Spiders can take only
  20. Hormone promoting maleness in flowering plants is
  21. Eye is an organ that can be called as
  22. One of the sequences given below represents a complete metamorphosis. Which one is it?
  23. Diseases in plants can be caused by
  24. A plant cell is distinguishable from an animal cell by the presence of
  25. The rate of growth of plants can be measured by a/an
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