A patient visits a doctor complaining of a stomach infection. The patient insists that he be prescribed enough antibiotics to kill all of the bacteria in his intestines. Why is this a bad idea? (Select all correct choices.)
A. It's notâ€"any bacteria in his intestines will
cause the patient to be sick.
B. Such an antibiotic treatment could result in
a serious C. difficile infection.
C. Many intestinal bacteria are beneficial
(they provide vitamins or break down
cellulose).
B,C
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Living organisms increase in complexity as they grow, resulting in a decrease in the entropy of an organism. How does this relate to the second law of thermodynamics?
A) Living organisms do not obey the second law of thermodynamics, which states that entropy must increase with time. B) Life obeys the second law of thermodynamics because the decrease in entropy as the organism grows is exactly balanced by an increase in the entropy of the universe. C) Living organisms do not follow the laws of thermodynamics. D) As a consequence of growing, organisms cause a greater increase in entropy in their environment than the decrease in entropy associated with their growth. E) Living organisms are able to transform energy into entropy.
Which structure in the human body regulates hunger and satiety (a sense of fullness)?
a. hypothalamus b. liver c. pancreas d. small intestine e. stomach
Postzygotic isolation barriers prevent
A. a hybrid embryo from developing into a fertile adult. B. fertilization. C. male gametes from joining with female gametes. D. All answers are correct. E. formation of gametes by one of the parents.
Cultures of a bacterial species were incubated out on the incubator shelf, in an anaerobic jar and in a candle jar. After incubation there was moderate growth of cultures in the candle and anaerobic jars, but heavy growth of the culture on the incubator shelf. This species is a/an
A. facultative anaerobe. B. microaerophile. C. aerobe. D. capnophile. E. anaerobe.