Nitrogen-fixing bacteria convert ____ to ____, which is a form of nitrogen that plants can use
a. nitrogen gas; ammonia
b. ammonia; nitrogen gas
c. nitrogen gas; nitrates
d. nitrogen gas; nitrites
e. ammonia; nitrates
ANSWER: a
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Which of the following represent possible functions for a protein folding domain (choose all that are applicable)?
A. catalysis B. ligand binding C. storage of genetic information D. transfer of an amino acid to a ribosome E. transport of molecules across a membrane
Large spherical cells of cyanobacteria that are able to fix atmospheric nitrogen are referred to as ________.
A. heterocysts B. nitrocysts C. microcysts D. oocysts
The plant hormone that promotes dormancy in
some plants and seeds is a. abscisic acid. b. auxin. c. gibberellin. d. ethylene. e. none of these.
The chemoreceptors that are responsible for the sense of taste are located mainly on the tongue in structures called __________.
Fill in the blank(s) with correct word