In a recent year a letter to europe from the united states costs .94 cents to mail. a letter mailed within the united states costs .44 cents. nancy mailed 5 letters for 3.70, some to europe and some to the united states. how many letters did she send to europe?

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step-by-step explanation:

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.