If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8? y = one-ninth y = two-thirds 54 96

Two-thirds

Step-by-step explanation:

6*?=72

?=12

12(2/3)=8

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.