Editor’s Selections: Compensating for alien genes, natural selection, and freshwater aquaria as vectors

May 14th, 2010 Editor's Selections 7 Comments
By Vincent Racaniello

Vincent RacanielloVincent Racaniello selects several notable posts each week from molecular and cellular biology and virology. He blogs at virology blog.

  • Resistance to bacterial antibiotics encoded on plasmids or the chromosome initially results in loss of fitness. But the cost may often be ameliorated without the loss of resistance.
  • The best-known of the Big Four forces of evolution is almost certainly natural selection. It is a relationship between fitness, the number of offspring an organism can produce, and phenotype, the value of one or more traits of that organism.
  • One of the pleasant surprises of a freshwater aquarium is the invertebrate organisms like snails and worms that show up and call your tank home. Unfortunately, the introduction of exotic invertebrates could pose a problem for natural freshwater systems.

I’ll be back next Friday with more selections.

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