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A small number of birds arrive on an island from a neighboring larger island. This small population begins to adapt to the new food plants available on the island, and their beaks begin to change. About twice a year, one or two more birds from the neighboring island arrive. What effect do these new arrivals have

Respuesta :

Answer:

The environmental variation

Explanation:

Environmental variation has a big role for their beaks to change in a size and shape , that means if the birds like the condition of the place specially birds like to eat cactus fruits that is the reason for their beak rapid change

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