question_answer 64)

  Choose the forms in which most plants absorb nitrogen (i) Proteins                          (ii) Nitrates and Nitrites (iii) Urea                    (iv) Atmospheric nitrogen (a) (i) and (ii)                      (b) (ii) and (iii)                    (c) (iii) and (iv)                   (d) (i) and (iv)

Answer:

                  (b) Nitrogen is an essential element used in the synthesis of proteins and other compounds. This is taken up in the from of inorganic nitrates or nitrites. Sometimes it is taken up as organic compounds i.e., urea, which have been prepared by bacteria from atmospheric nitrogen.