In the late 1980s and early 1990s, the percentage of Icelandic children whose bacterial infections were caused by bacteria resistant to penicillin rose at an alarming rate
After public health officials initiated a campaign to reduce the use of penicillin, resistance dropped off. (See the accompanying figure.) This observation is consistent with the hypothesis that ________. A) bacteria generate mutations so that they can evolve in order to become better adapted to their environment
B) the use of antibiotics generates mutations in bacteria that affects their resistance
C) antibiotics really have no effect on bacterial resistance; such fluctuations are natural and occur whether we use antibiotics or not
D) bacterial populations evolve in response to the selection pressure imposed by antibiotics
D
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According to William Hamilton's theory of inclusive fitness, genes that promote altruism can evolve if those helped are relatives. Why does the theory specify relatives?
What will be an ideal response?
Hydrogenated vegetable oil or trans fats are
a. as healthy as natural vegetable oil. b. as healthy as animal fats. c. more healthy than animal fats. d. less healthy than animal fats or vegetable oils. e. more healthy than vegetable oils.
According to ____, environmental pressures caused changes in body parts, which were directed by ____ and passed
onto offspring.
a. Lyell; genetics b. Lamarck; fluida c. Darwin; genetics d. Cuvier; lineages e. Aristotle; fluida
Excessive utilization of fat for energy increases blood ______, which are organic acids.
Fill in the blank(s) with the appropriate word(s).