feathers, which range from dull brown to bright blue. Juvenile birds with dull brown feathers are not attacked by adult birds and are able to obtain high quality territories and reproduce more. Juvenile birds with bright blue feathers are more attractive to mates and reproduce more when they become adults. However, birds with intermediate plumage are often attacked by adults and usually fail to reproduce. This is an example of what type of selection? Stabilizing Directional Disruptive Frequency-dependent Artificial

feathers, which range from dull brown to bright blue. Juvenile birds with dull brown feathers are not attacked by adult birds and are able to obtain high quality territories and reproduce more. Juvenile birds with bright blue feathers are more attractive to mates and reproduce more when they become adults. However, birds with intermediate plumage are often attacked by adults and usually fail to reproduce. This is an example of what type of selection? Stabilizing Directional Disruptive Frequency-dependent Artificial

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter20: Speciation And Macroevolution

Section: Chapter Questions

Problem 13TYU: EVOLUTION LINK Could hawthorn and apple maggot flies be considered an example of assortative mating,...

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Concept explainers

Animal Behavior

Animal behavior can be defined as all the things that animals do. In response to a stimulus, an animal performs a certain fixed action pattern, or FAP, of behavior. This response occurs to make the animal more adaptable to change. So, behavior is generally a stimulus-oriented response. A behavior is an expression of the capabilities of the nervous system. A stimulus is determined by the environment, while the nervous system determines a response.

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The survival and reproduction of young Lazuli buntings (birds) depends on the brightness of their
feathers, which range from dull brown to bright blue. Juvenile birds with dull brown feathers are not
attacked by adult birds and are able to obtain high quality territories and reproduce more. Juvenile birds
with bright blue feathers are more attractive to mates and reproduce more when they become adults.
However, birds with intermediate plumage are often attacked by adults and usually fail to reproduce.
This is an example of what type of selection?
Stabilizing
Directional
Disruptive
Frequency-dependent
Artificial

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EVOLUTION LINK Could hawthorn and apple maggot flies be considered an example of assortative mating, which was discussed in Chapter 19? Explain your answer.