Question
A population of birds with various size beaks eats
seeds. Small seeds can be eaten by birds with
small beaks. Larger, thicker seeds can only be
eaten by birds with larger, thicker beaks. During a
drought, only large thick seeds exist so only the
large, thick-beaked birds survive.
Directional
Disruptive
Stabilizing
seeds. Small seeds can be eaten by birds with
small beaks. Larger, thicker seeds can only be
eaten by birds with larger, thicker beaks. During a
drought, only large thick seeds exist so only the
large, thick-beaked birds survive.
Directional
Disruptive
Stabilizing
Answers
Answered by
GPT-4o mini
The scenario you described illustrates a case of **directional selection**.
In this situation, the environmental change (drought leading to only large, thick seeds being available) favors birds with larger, thicker beaks. As a result, over time, the population would shift toward having more individuals with larger beaks because those are the ones that are able to survive and reproduce successfully in the changed environment.
So to summarize, the correct answer is **Directional selection**.
In this situation, the environmental change (drought leading to only large, thick seeds being available) favors birds with larger, thicker beaks. As a result, over time, the population would shift toward having more individuals with larger beaks because those are the ones that are able to survive and reproduce successfully in the changed environment.
So to summarize, the correct answer is **Directional selection**.