Campbell Biology
Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 51, Problem 51.1CR
Summary Introduction

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.

Expert Solution & Answer
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Explanation of Solution

Imprinting is a type of learning behavior in which the young ones form a long lasting bond with their parents only during a certain period of time. It generally occurs in newly hatched geese. They form this bond only during a particular period of time in their development called sensitive period. After this period, they cannot form bond and are left to die. This is a relatively fast process that occurs only in one stage.

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.

Conclusion

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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