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 Medium Beak Size Large Select TWO processes that are MOST LIKELY to cause the variation in bird beak size traits within this population. □ r A B. Hibernation C. Asexual reproduction E Sexual reproduction Migration Mutation

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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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
Medium
Bea
Large
Select TWO processes that are MOST LIKELY to cause the variation in bird beak size traits within this
population.
A
B.
C
Asexual reproduction
Hibernation
Sexual reproduction
D. Migration
Mutation
Transcribed Image Text: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 Medium Bea Large Select TWO processes that are MOST LIKELY to cause the variation in bird beak size traits within this population. A B. C Asexual reproduction Hibernation Sexual reproduction D. Migration Mutation
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