On the Galápagos Islands,the Tool-Using Woodpecker Finches Modify Twigs to Pry

question 38

Multiple Choice

On the Galápagos Islands,the tool-using woodpecker finches modify twigs to pry out grubs.With no true woodpeckers on the Galápagos Islands,this behavior allows it to exploit an untapped food source.However,not all members of this species exhibit this behavior which is learned from watching other finches.Therefore,

• A)hatchlings will not know how to do this.
• B)it is probably not "hardwired" in the brain as a behavior passed on genetically.
• C)there must be a great advantage to reaching this food source for this learned behavior to be repeated by most descendants of each generation.
• D)as an acquired characteristic,in a strict sense this may not be part of the adaptive radiation of finches on the Galápagos.
• E)all of the choices are correct.

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