How many solutions do these have? ? x-4y=12; 5x-20y=60 1 2 infinitely many none y-7x=-14; 7y-49x=-2 1 2 infinitely many none

your answer would be 10x - 1

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.