High School

We appreciate your visit to After the drought only one in seven finches survived When the survivors were measured it was found that most were finches with big beaks Why. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

After the drought, only one in seven finches survived. When the survivors were measured, it was found that most were finches with big beaks.

Why do you think bigger-beaked birds survived better than the smaller-beaked birds?

Answer :

Final answer:

Birds with bigger beaks survived better than smaller beaked birds because they were able to crack and eat seeds of all sizes, while smaller beaked birds could only eat smaller seeds. This led to an increase in the average beak size in the surviving finch population, demonstrating evolution by natural selection.

Explanation:

The reason bigger beaked birds survived better than smaller beaked birds after the drought is because there were fewer seeds available for the finches to eat. Birds with smaller beaks could only crack open and eat smaller seeds, while birds with bigger beaks were able to crack and eat seeds of all sizes.

Since smaller seeds were scarce during the drought, the small-beaked birds had less food to survive on and many of them died. On the other hand, the birds with bigger beaks were able to find and eat a wider variety of seeds, which increased their chances of survival.

As a result, the population of finches that survived and reproduced after the drought consisted mostly of birds with bigger beaks. This led to an increase in the average beak size in the finch population, which is an example of evolution by natural selection.

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