Microbes of the same species that live together and cooperate in some way are
A. mutualistic.
B. colonial.
C. commensal.
D. opportunistic.
B. colonial.
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Biofilms in the human mouth primarily contain pathogens
Indicate whether the statement is true or false.
In influenza virus, antigenic shift
A. results from reassortment of genomes when two different strains of flu viruses infect the same cell. B. can result in major epidemics or pandemics. C. results from the accumulation of mutations in HA and NA in a single strain of flu virus. D. results from reassortment of genomes when two different strains of flu viruses infect the same cell and can result in major epidemics or pandemics.
What traits do green algae and plants have in common?
_____ plastids. _____ chlorophyll a and b. _____ a sporic life cycle. _____ beta-carotene. _____ embryos.
Which of the following is an active enzyme?
A) apoenzyme B) cofactor C) coenzyme D) holoenzyme E) subtrate