Ella bought some key chains and spent a total of $24. Each key chain cost the same whole-dollar amount. Shae bought between 7 and 11 key chains. How many key chains did Ella buy?

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.