Which of the following can be considered a habitat corridor?
A) a large lake in a city park
B) an abandoned agricultural field in an urban area
C) a strip of forest along the banks of a river flowing from a forested mountain through a city
D) a patch of forest within a city park
C
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Using the information presented in the figure above (where nuclear DNA was digested with MstII,
subjected to gel electrophoresis, and probed in a Southern blot with the indicated probe), which lane probably had a DNA sample from a nonhuman source, at least partial homology to the beta-globin gene, and a different arrangement of MstII restriction enzyme sites than found in humans?
a. 1 b. 2 c. 3 d. 4 e. 5
In an experiment, the control group
a. is not subjected to experimental error. b. is exposed to experimental treatments. c. is identical to the one being tested except for the variable being studied. d. is treated exactly the same as the experimental group, except for the one independent variable. e. is statistically the most important part of the experiment
A student measuring the pH of the water in a fish tank found it to have a pH of 8. Which one of the following statements is TRUE regarding that solution?
A) The water is alkaline. B) The water does not contain hydrogen ions. C) The water contains equal numbers of hydrogen ions and hydroxyl ions. D) The water is highly acidic. E) The water is more alkaline than a solution with a pH of 10.
Multidrug-resistant bacteria
A) are not serious threats to human health. B) have always been common in the natural environment. C) have been eradicated worldwide. D) are becoming less widespread. E) are becoming more widespread.