Why are genes associated with nitrogen fixation not typically used to identify bacteria species? (Select all correct choices.)
A. Their sequences are similar to those of
rRNA genes.
B. These genes are not typically exchanged
between bacteria by horizontal gene transfer.
C. These genes are often exchanged
between bacteria by horizontal gene transfer.
D. Every bacterium contains nitrogen fixation
genes.
C
You might also like to view...
Plants contain meristems whose major function is to _____
A) attract pollinators B) absorb ions C) photosynthesize D) produce more cells E) produce flowers
Human diet must be varied enough to provide ____________________ of the 20 amino acids from the foods we eat
Fill in the blank(s) with correct word
The White Cliffs of Dover, a famous landmark in England, is made of limestone, which is really a collection of the pore-studded shells (tests) of
A. diatoms. B. dinoflagellates. C. brown algae. D. spirochetes. E. foraminifera.
The condition called parasitism is characterized as a(n)
A) relationship between two organisms where only one member benefits and the other is unharmed. B) relationship between two organisms where both members benefit. C) nonsymbiotic relationship. D) unsuccessful microbial invasion due to the presence of preexisting microbes. E) relationship between two organisms where one member harms the other.