How does the ability of bacteria to acquire new genes affect antibiotic resistance?
What will be an ideal response?
A bacterial gene can mutate in such a way that an antibiotic no longer affects it. Suppose a gene for antibiotic resistance arises by mutation in a bacterial cell. This gene can not only be passed on to that cell's descendents, but also can be transferred to other existing cells. Gene transfers speed the rate at which a gene spreads through a population, thus accelerating the response to selective pressure.
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What is the major difference between a genomic library and a cDNA library?
What will be an ideal response?
For water to be transported to the top of a tall tree, several forces must be at work. From the choices below, which combination of forces explains this sort movement?
a. turgor pressure and evaporation b. water heat capacity and pH c. cohesion and transpiration d. gravity and conductivity
Merozoites are a result of
A. meiosis. B. schizogony. C. mitosis. D. crossing over. E. conjugation.
When two different species live in the same area and use the same limited resources which of the following will occur?
a. competition b. succession c. parasitism d. industrialization