Last year, Ryan opened an investment account with $8600. At the end of the year, the amount in the account had decreased by 27.5%. How much is this decrease in dollars? How much money was in his account at the end of last year?
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ab: 2 n83b8eb7ebi. 8e yen in

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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.