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A benefit of a deep beak is that it helps with eating harder seeds during a drought, but deep beaks also have disadvantages. Finches with deep beaks require more food and are less likely to survive the juvenile period than finches with shallow beaks. After the drought subsided on Daphne Major, what is likely to have happened to the average beak depth of the next generation?

Answer :

It is likely that the average beak depth of the next generation decreased as the shallow beaks were more likely to survive the juvenile period.

What are deep beaks and shallow beak benefits?

Deep beaks were favoured in an environment with a large availability of food. This allowed deep beaks to become more common in the population, leading to an increase in the average beak depth. Deep beaks allowed for more efficient feeding, leading to increased reproductive success and population growth.

As the environment returned to normal, natural selection favoured shallow beaks as they were more efficient at obtaining food. This allowed shallow beaks to become more common in the population, leading to a decrease in the average beak depth. Additionally, shallow beaks were more likely to produce more offspring due to their increased survival rates, further contributing to the decrease in the average beak depth.

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