-12x + 18 – 10x – 5 = -31

22

Step-by-step explanation:

Step 1:

- 12x + 18 - 10x - 5 = - 31

Step 2:

- 22x + 18 - 5 = -31

Step 3:

- 22x + 13 = - 31

Step 4:

- 22x = - 44

x = 22

Hope This Helps :)

step-by-step explanation:

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.