Concept explainers
To review: The differences between imprinting that occur in geese with the song development in sparrow.
Concept introduction: The behavior of the offspring is largely influenced by the environment in which it completes its development.

Explanation of Solution
The “song development” in sparrows is a “gradual process” that takes place in stages. The nestling bird listen the song of parent sparrow for fifty days and memorizes it. After maturation, they sing a preliminary note called subsong. They compare this song with the one that they memorized and when the two songs match, they finalize it. They then sing this song for the rest of their life.
The behavior of offspring is determined by the factors such as physical and social environment. Some behaviors such as to recognize the mothers in geese is very crucial for the survival of the offspring. Hence, development of some behavior is very beneficial for survival.
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Chapter 51 Solutions
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