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Young birds often open their mouths wide and make noises to induce their parents to regurgitate food for them to consume (see the photograph below). Which one of the following facts does NOT support this behavior of these young birds being an example of innate behavior?
A.The baby birds engage in this behavior the first time that one of their parents returned from foraging for food.
B.This display is very similar from one baby bird to another.
C. A simple model of the parent bird, when moved close to the nest, will induce this behavior by the baby birds.
D. As they get older, the baby birds get better at inducing their parents to supply them with food.
E. A survey of several thousand nests of this species of birds shows that all the baby birds observed displayed this type of behavior.
D. ...birds get better at inducing parents to supply food.
Innate behavior does not depend on learning or maturation. Those processes may improve an existing innate behavior, or they may be involved in new behaviors being adopted, but they are not evidence for the behavior being innate.
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