Which group includes all of the other groups?
a. domain
b. order
c. family
d. genus
e. species
Answer: a
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What personal characteristics and events in Gregor Mendel's life significantly contributed to his ultimate contribution to the study of inheritance?
A. His training in physics and mathematics at the University of Vienna. B. He failed his physics exam. C. He failed his natural history exam. D. He got his teaching license at the age of 21. E. He got a job as a substitute teacher and enjoyed it.
Bacterial plasmids
A. are essential for growth. B. can provide genes that allow the bacteria to grow and thrive in the presence of potential toxins. C. are essential for cellular respiration. D. are artificially created by humans and are present in bacteria only because humans put them there. E. are essential for chromosome replication and binary fission.
Pulmonary veins carry
A. oxygenated blood. B. deoxygenated blood. C. a mixture of oxygenated and deoxygenated blood.
Which of the following is the best definition of "microbial antagonism"?
A. the presence of pathogens on the surface of the skin, which will invade the body through abrasions B. the presence of normal microbiota that protect the body by competing with pathogens in a variety of ways to prevent pathogens from invading the body C. the presence of normal microbiota that can become pathogens under certain conditions D. the ability of microbiota to mutate into pathogens E. the presence of resident bacteria on the surface of the body and in cavities that connect to the surface