Antibiotics kill susceptible bacteria, and those that survive possess a genetic mutation that renders them impervious to the drug. The survivors reproduce and pass on the beneficial mutation to the next generation. What type of selection does this describe?
disruptive selection
stabilizing selection
genetic void
directional selection
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What is thought to have caused the mass extinction at the end of the cretaceous period?
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Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.
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The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.
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Antibiotics kill susceptible bacteria, and those that survive possess a genetic mutation that render...
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