Which of the following is a nitrogen-fixing bacterium that forms associations with the roots of plants?
A) anaerobic Bacillus species
B) Clostridium species
C) Rhizobium species
D) Azotobacter species
E) cyanobacteria
C
Biology & Microbiology
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Biology & Microbiology
A plant that requires two years to complete its life cycle is referred to as:
a. a biennial. b. an annual. c. a perennial. d. a dicot. e. a monocot
Biology & Microbiology
Which domain(s) consist(s) of prokaryotic cells?
A) Bacteria only B) Eukarya only C) Archaea and Eukarya D) Bacteria and Archaea
Biology & Microbiology
Mutations can affect hormone receptors in the following ways, except for which statement?
A. Result in missing or defective receptors B. Alter the rate of production of receptors C. Affect the response to a hormone D. Decrease the level of hormones in their vicinity E. Alter the binding site of receptors
Biology & Microbiology