An episome is
A. a plasmid that can make bacterial cells resistant to antibiotics.
B. a plasmid that gives bacteria the ability to degrade toluene.
C. a plasmid that can integrate into the bacterial genome.
D. a plasmid that can turn a bacteria that is harmless into a strain that can cause disease.
E. a plasmid that gives bacteria the ability to exchange DNA with another bacterial cell.
C. a plasmid that can integrate into the bacterial genome.
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An increase in air temperature will result in ____ water vapor in the atmosphere because warm air
holds _____ water vapor than cold air does.
a. more; less b. more; more c. less; less d. less; more e. no change in; less
If a person was not able to produce pancreatic
secretions, which macromolecule(s) would they have difficulty digesting?
a. carbohydrates b. proteins c. fats d. nucleic acids e. all of these
Which region of the ? phage genome enables the linear chromosome to circularize when it enters a host cell?
A) cohesive (cos) site B) IS10 C) early operators D) integrase (int) gene E) excisionase (xis) gene
Currently the only predators of Galápagos marine iguanas are Galápagos hawks. Iguana body size is not correlated with risk of hawk predation, although small iguanas can sprint faster than large iguanas
If predators (for example, cats) that preferably catch and eat slower iguanas are introduced to the island, iguana body size is likely to _____ in the absence of other factors; the iguanas would then be under _____ selection. A) increase; directional B) increase; disruptive C) decrease; directional D) decrease; disruptive