• Card 3 / 112: Due to a recent hurricane, the local seeds available for forage are much smaller than in the past. Local seed eating birds that were adapted to harvest the larger seeds appear to be having a hard time obtaining the smaller seeds. However, those individuals with smaller beaks are finding it easier to get the seeds, and with less competition. According to the theory of natural selection, what changes will likely occur in this population?
  A) Over time, individuals will show smaller beaks, because this is more advantageous for the birds.
  B) The birds with the smaller beaks will most likely be more successful in foraging and therefore breeding, which over time will lead to a population with smaller beak size.
  C) The birds will choose to pass on the smaller beak size gene to their offspring, because it is now the better phylogeny.
  D) The next generation of birds will have smaller beaks, because they will be able to forage better.

  Answer:
  B) The birds with the smaller beaks will most likely be more successful in foraging and therefore breeding, which over time will lead to a population with smaller beak size.

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Evolutionary Biology & Ecology BIO102 Author: Dr.Olivia D'AmbrogioLecturer Saylor.org USA Access: Public Instant Grading