. The main forms of nitrogen taken up by plant roots and useful to plants is:

A. N-N
B. nitrite
C. nitrite and nitrate
D. ammonia and N-N
E. nitrate and ammonia


E. nitrate and ammonia

Biology & Microbiology

You might also like to view...

The genetic code uses _________ nucleotide(s) to specify one amino acid.  

A.  one B.  two C.  three D.  four E.  64

Biology & Microbiology

Which is/are the correct form(s)?

A. Staphylococcus aureus B. Staphylococcus aureus C. staphylococcus aureus D. S. aureus E. Staphylococcus aureus AND S. aureus

Biology & Microbiology

Which structure constitutes part of the axial skeleton?

A) skull B) pelvic girdle C) pectoral girdle D) radius

Biology & Microbiology

Which of the following vaccines can cause the disease it is designed to prevent?

A) tetanus toxoid vaccine B) oral polio vaccine C) inactivated polio vaccine D) Haemophilus influenzae capsule vaccine E) meningococcal capsule vaccine

Biology & Microbiology