Bird Beak Variation Bird beak size is often related to the type of food the bird eats and the size of the food source. Some birds eat seeds as food. Birds with large beaks are better able to eat larger seeds, while birds with small beaks typically eat smaller seeds. An environmental change occurred that resulted in a reduction in one type of food, namely small seeds. The change caused a shift in the distribution of beak sizes observed. The graph shows the distribution of birds of various beak sizes before and after the change. original population Percentage of Population Small population after environmental change V Medium Beak Size Large How can an environmental change cause a shift in the traits of a population? C B. An environmental change can make some organisms better suited for survival than others. C C. An environmental change can cause organisms to choose traits that are more favorable. D An environmental change can cause some organisms to change their behaviors and quit reproducing. An environmental change can make organisms that are less suited for survival reproduce more rapidly.

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Bird Beak Variation
Bird beak size often related to the type of food the bird eats and the size of the food source. Some birds eat
seeds as food. Birds with large beaks are better able to eat larger seeds, while birds with small beaks typically
eat smaller seeds.
An environmental change occurred that resulted in a reduction in one type of food, namely small seeds. The
change caused a shift in the distribution of beak sizes observed. The graph shows the distribution of birds of
various beak sizes before and after the change.
original population
Percentage of Population
Small
population after
environmental change
Medium
Beak Size
Large
How can an environmental change cause a shift in the traits of a population?
O
●
B. An environmental change can make some organisms better suited for survival than others.
C.
An environmental change can cause organisms to choose traits that are more favorable.
D
An environmental change can cause some organisms to change their behaviors and quit
reproducing.
An environmental change can make organisms that are less suited for survival reproduce
more rapidly.
Transcribed Image Text:Bird Beak Variation Bird beak size often related to the type of food the bird eats and the size of the food source. Some birds eat seeds as food. Birds with large beaks are better able to eat larger seeds, while birds with small beaks typically eat smaller seeds. An environmental change occurred that resulted in a reduction in one type of food, namely small seeds. The change caused a shift in the distribution of beak sizes observed. The graph shows the distribution of birds of various beak sizes before and after the change. original population Percentage of Population Small population after environmental change Medium Beak Size Large How can an environmental change cause a shift in the traits of a population? O ● B. An environmental change can make some organisms better suited for survival than others. C. An environmental change can cause organisms to choose traits that are more favorable. D An environmental change can cause some organisms to change their behaviors and quit reproducing. An environmental change can make organisms that are less suited for survival reproduce more rapidly.
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