Darwin noticed that Galapagos finches had beaks that were perfectly adapted to the food sources available on the island on which they lived
Peter and Rosemary Grant found that average beak size in G. fortis on Daphne Major increased in drought years when seeds became larger and tougher, and decreased in wet years when seeds became smaller and softer
Antibiotic-resistant bacterial populations can evolve by natural selection
While you are expected to know the examples of natural selection described above, you could also be given an unfamiliar example, so make sure that you can describe the process of natural selection:
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