Lenski and Travisano compared what happened to the fitness of cells in 12 replicate lines of E. coli. The re-sults of the experiment graphed in the figure above indicate that:
a. only 500 generations into the experiment, natural selection had already increased the fitness of the evolved strains.
b. the average fitness decreased substantially over the first 2,000 to 3,000 generations of the ex-periment.
c. the average fitness increased substantially over the first 2,000 to 3,000 generations of the ex-periment.
d. A and B.
e. A and C.
E
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If you are interested in observing a relatively simple community structure in a clear water lake, you would do well to choose diving into _____
A) an oligotrophic lake B) a eutrophic lake C) a relatively shallow lake D) a nutrient-rich lake E) a lake with consistently warm temperatures
Which of the following is a common cause of
interrupted breathing? a. sleep apnea b. lung cancer c. high altitude sickness d. low red blood cell count e. none of these
Newer, more expensive antimicrobials are always better to use than cheaper, older drugs.
Answer the following statement true (T) or false (F)
Saturated fats are seen only in
a. plants b. animals