9x – 19 = 2x – 5

solve

x=2

Step-by-step explanation:

9x-19 = 2x-5

Subtract 2x and add 19 on both sides:

9x-2x = 19-5

7x =14

Divide both sides by 7:

x =14/7

x=2

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.