If nitrifying bacteria were not present in a soil, plants would ____

a. take up nitrogen for their use mainly as NH4+
b. not survive because they could not get useful nitrogen
c. take up nitrogen for their use mainly as N2
d. take up nitrogen for their use mainly as NH3
e. take up nitrogen for their use mainly as NO3-


ANSWER: a

Biology & Microbiology

You might also like to view...

Oxidation in biological systems is usually accompanied by

A) repulsion. B) hydrogenation. C) dehydrogenation. D) resonance stabilization. E) all of the above

Biology & Microbiology

Viruses are classified by:

a. the sequence of their DNA. b. structural similarities. c. the sequence of their rRNA genes. d. the traditional Linnaean binomial nomenclature system. e. an international committee

Biology & Microbiology

The first protein to have its amino acid sequence determined was:

A) myoglobin B) keratin C) hemoglobin D) spider silk E) beef insulin

Biology & Microbiology

The inflammatory process includes redness, heat, pain, loss of function, and:

a. pus drainage b. scabbing c. swelling d. scarring

Biology & Microbiology