Andre and sally are playing a number game. andre tells sally, "i'm thinking of a number between 1 and 20. if i take the number and add 5, and then subtract 3, i get 19." what number is andre thinking of?

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.