Research into the acquisition of birdsong has indicated that birdsongs are:
A)learned from other birds.
B)genetically determined.
C)learned specifically from parents.
D)genetically determined and learned from other birds.

Question

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The Answer of Research into the acquisition of birdsong has indicated that birdsongs are:
A)learned from other birds.
B)genetically determined.
C)learned specifically from parents.
D)genetically determined and learned from other birds.

Research into the Acquisition of Birdsong Has Indicated That Birdsongs