Inside nitrogen-fixing nodules, one N2 molecule is converted into two
A. N.
B. NO.
C. NO2.
D. NO3.
E. NH3.
E. NH3.
With the assistance of the enzyme nitrogenase, each N2 molecule is converted to two molecules
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The liver functions to
a. produce bile. b. pump blood. c. form urea. d. do both a and c.
During translation, attachment of a "start" codon to the small ribosomal subunit constitutes the beginning of the ________ stage
Fill in the blank(s) with correct word
Which step in the evolution of life is the most complex and probably occurred last?
A. Formation of amino acids B. Formation of protein–RNA systems C. Formation of membrane-bound protocells D. Spontaneous formation of organic compounds under abiotic conditions E. Formation of ATP
The ABO antigens and Rh antigens are the only blood groups considered before a transfusion.
Answer the following statement true (T) or false (F)