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Listen to the following information about medium ground finches:

Medium ground finches on the Galapagos Islands eat a variety of seeds. Some finches have larger beaks and can eat harder, larger seeds. Some finches have smaller beaks and can eat smaller, softer seeds. When droughts occur, the smaller and softer seeds are no longer available.

How will natural selection affect the population of medium ground finches when faced with prolonged drought?

Select all that apply:

A. Individuals with smaller beaks will survive at higher rates.
B. Individuals with larger beaks will die at higher rates.
C. The frequency of small beaks in the population will increase.
D. The frequency of large beaks in the population will increase.
E. Individuals with larger beaks will survive at higher rates.
F. Individuals with smaller beaks will die at higher rates.

Answer :

Final answer:

In a drought, medium ground finches with smaller beaks will die due to the lack of soft seeds, while those with larger beaks will survive and reproduce more effectively. This leads to an increase in the average beak size in the population over time due to natural selection. Thus, larger-beaked individuals will become more prevalent in the finch population.


Explanation:

Impact of Natural Selection on Medium Ground Finches

During a prolonged drought on the Galápagos Islands, the availability of smaller and softer seeds diminished, leaving primarily larger and harder seeds. Medium ground finches exhibit variation in beak size, with some having larger beaks capable of cracking hard seeds, whereas others possess smaller beaks suited for softer seeds. In this scenario, the following outcomes from natural selection can be expected:

  • Individuals with smaller beaks will not survive as effectively because they cannot access the limited food supply.
  • Individuals with larger beaks will survive at higher rates due to their ability to eat the remaining seeds.
  • The frequency of large beaks in the population will increase as larger-beaked birds reproduce more successfully.

Consequently, the overall average beak size in the finch population will increase following the drought, demonstrating a clear instance of evolution by natural selection. Therefore, the correct selections regarding the effects on the population of medium ground finches during a drought are:

  • Individuals with smaller beaks will die at higher rates.
  • The frequency of larger beaks in the population will increase.
  • Individuals with larger beaks will survive at higher rates.

Learn more about natural selection here:

https://brainly.com/question/4075522


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